Upper Silesia: why a vote did not draw one obvious frontier
Explain the 1921 plebiscite and later referral while distinguishing local results, violence and the institutions responsible.
Exam scope and assessment notes
Thirty-two introductory lessons and 96 explained tasks address revised International AS enquiry 8.2: Wilson’s programme, inclusion of the Covenant in the treaties, aims and structure; restricted and changing membership, leadership, voting processes and enforcement; all six named disputes—Åland, Teschen, Vilna, Upper Silesia, Memel and the Greek-Bulgarian border incident; and the five named agency fields—refugees, the ILO, slavery, disarmament and mandates. Four selected comparisons use labelled original paraphrases, not quotations or complete authentic four-source sets. These are introductions, not verified full historical depth or full AS or A Level preparation. Thirty-nine further introductory lessons and 117 explained tasks address enquiry 8.4 through the Dawes and Young proposals, German recovery and League entry, Geneva Protocol support and opposition, Locarno, Kellogg–Briand, the Hague settlement and evacuation, Stresemann and Briand, Italian ambitions, Soviet relations, European and Pacific limits and the immediate impact of the Wall Street Crash. Four further selected comparisons use labelled original paraphrases. Enquiries 8.1–8.4 now have introductory routes; fuller historical depth, specialist review and assessment remain unfinished. Thirty-six further introductory lessons and 108 explained tasks address enquiry 8.3: Fiume, Corfu, the Ruhr crisis and German hyperinflation; ethnic, political and economic problems in successor states and the Little Entente; Washington, Genoa, Rapallo and Lausanne; Britain, France, Germany and Italy, Soviet diplomacy and communism, US involvement and Japan’s internal and international concerns. Four further selected comparisons use labelled original paraphrases. Thirty-nine further introductory lessons and 117 explained tasks address enquiry 8.4 through the Dawes and Young proposals, German recovery and League entry, Geneva Protocol support and opposition, Locarno, Kellogg–Briand, the Hague settlement and evacuation, Stresemann and Briand, Italian ambitions, Soviet relations, European and Pacific limits and the immediate impact of the Wall Street Crash. Four further selected comparisons use labelled original paraphrases. Enquiries 8.1–8.4 now have introductory routes; fuller historical depth, specialist review and assessment remain unfinished. Wider authentic reading, subject-specialist review, timed papers and calibrated marking remain unfinished. Existing 2026 lessons receive no automatic revised-year coverage credit. International relations, 1919–1929 belongs to International Paper 1 in 2028 and International Paper 2 in 2027 and 2029. Keep it separate from the 2026 League topic and the imperialism rotation. Paper 1 Historical sources is 75 minutes and 40 marks: both parts of one question use four sources totalling at most 600 words, at least three written and up to one visual. Part (a) compares two sources for 15 marks; part (b) uses all four and contextual knowledge for a 25-mark judgement. Paper 2 Outline study is 105 minutes and 60 marks: answer two questions from one section, both parts of each, with a 10-mark causal explanation and a 20-mark argument. These lessons are not complete papers or calibrated assessment.
Before you begin
- Distinguish a rule, a proposal, a referral, an agreement and actual implementation
- Identify the responsible institution and date; retain affected perspectives and separate contemporary statements from later editorial context
Work on paper. Try each question before revealing help, and explain why your method works.
Quick readiness check
How should you evaluate the League’s work in the 1920s?
What you will learn
- Why did the aggregate result not define an undisputed boundary?
- What did the August 1921 parliamentary announcement establish?
- Why did Upper Silesia require more than a plebiscite?
Develop an International AS historical argument
- Write your own response before opening the model.
- Use dated evidence, identify each institution and compare rules, state cooperation and practical outcomes. Attribute claims and distinguish source passages from later editorial context.
Thirty-two introductory lessons and 96 explained tasks address revised International AS enquiry 8.2: Wilson’s programme, inclusion of the Covenant in the treaties, aims and structure; restricted and changing membership, leadership, voting processes and enforcement; all six named disputes—Åland, Teschen, Vilna, Upper Silesia, Memel and the Greek-Bulgarian border incident; and the five named agency fields—refugees, the ILO, slavery, disarmament and mandates. Four selected comparisons use labelled original paraphrases, not quotations or complete authentic four-source sets. These are introductions, not verified full historical depth or full AS or A Level preparation. Thirty-nine further introductory lessons and 117 explained tasks address enquiry 8.4 through the Dawes and Young proposals, German recovery and League entry, Geneva Protocol support and opposition, Locarno, Kellogg–Briand, the Hague settlement and evacuation, Stresemann and Briand, Italian ambitions, Soviet relations, European and Pacific limits and the immediate impact of the Wall Street Crash. Four further selected comparisons use labelled original paraphrases. Enquiries 8.1–8.4 now have introductory routes; fuller historical depth, specialist review and assessment remain unfinished. Thirty-six further introductory lessons and 108 explained tasks address enquiry 8.3: Fiume, Corfu, the Ruhr crisis and German hyperinflation; ethnic, political and economic problems in successor states and the Little Entente; Washington, Genoa, Rapallo and Lausanne; Britain, France, Germany and Italy, Soviet diplomacy and communism, US involvement and Japan’s internal and international concerns. Four further selected comparisons use labelled original paraphrases. Thirty-nine further introductory lessons and 117 explained tasks address enquiry 8.4 through the Dawes and Young proposals, German recovery and League entry, Geneva Protocol support and opposition, Locarno, Kellogg–Briand, the Hague settlement and evacuation, Stresemann and Briand, Italian ambitions, Soviet relations, European and Pacific limits and the immediate impact of the Wall Street Crash. Four further selected comparisons use labelled original paraphrases. Enquiries 8.1–8.4 now have introductory routes; fuller historical depth, specialist review and assessment remain unfinished. Wider authentic reading, subject-specialist review, timed papers and calibrated marking remain unfinished. Existing 2026 lessons receive no automatic revised-year coverage credit.
Original teaching brief and analytical model
The opening brief is original StudyForA teaching prose, not a quotation or contemporary source. International relations, 1919–1929 belongs to International Paper 1 in 2028 and International Paper 2 in 2027 and 2029. Keep it separate from the 2026 League topic and the imperialism rotation. Paper 1 Historical sources is 75 minutes and 40 marks: both parts of one question use four sources totalling at most 600 words, at least three written and up to one visual. Part (a) compares two sources for 15 marks; part (b) uses all four and contextual knowledge for a 25-mark judgement. Paper 2 Outline study is 105 minutes and 60 marks: answer two questions from one section, both parts of each, with a 10-mark causal explanation and a 20-mark argument. These lessons are not complete papers or calibrated assessment.
StudyForA teaching brief · original prose · Upper Silesia: why a vote did not draw one obvious frontier
[1] Original analytical teaching prose, not a quotation or contemporary source. Explain the 1921 plebiscite and later referral while distinguishing local results, violence and the institutions responsible.
1. Why did Upper Silesia require more than a plebiscite?
Compare after trying
Upper Silesia required more than a plebiscite because the consultation did not produce one simple geographical or political answer. The region contained mixed communities and important industrial connections. Results could differ between localities, so a regional total did not itself determine how a frontier should divide people, workplaces and resources.
The plebiscite of March 1921 also belonged to inter-Allied arrangements rather than independent League administration. Violence and disagreements among the principal powers complicated the next steps. The August parliamentary exchange records the Council being asked for an opinion on the frontier, showing how referral provided a further institutional route rather than proving that the entire settlement had already been completed.
The value of that route must be assessed through the later decisions and practical arrangements. An announcement of referral cannot establish local consent or the success of protections that still had to operate. The case therefore connects consultation with political and economic choices, rather than opposing voting and diplomacy as mutually exclusive methods. Accurate evaluation distinguishes the distribution of preferences, the institutions making decisions and the implementation of the eventual division.
Why this response fits
- Develop a reasoned answer using specific, dated evidence.
- Compare purposes, procedures, state cooperation and practical outcomes.
- This original model is not an authentic source, calibrated examination script or Cambridge grade.
Identify the competing stakes
Upper Silesia combined mixed national affiliations with important coal and industrial resources. A frontier could affect communities, workplaces and economic connections at the same time. German and Polish arguments about the region therefore involved more than a simple contest between two homogeneous populations. A national campaign’s description should be compared with the actual geography and categories of the vote rather than treated as a neutral statement of every resident’s identity.
Date and locate the plebiscite
The plebiscite took place on 20 March 1921 under inter-Allied arrangements established after the peace treaty. It was not an independently administered League vote. Results differed between localities, so an aggregate majority did not automatically define one undisputed boundary through the region. The conduct of the consultation, eligibility rules and distribution of preferences need to be considered alongside the total when explaining why disagreement continued.
Connect violence and Allied disagreement
Political mobilisation and violence complicated the attempt to translate results into a frontier. The Allied powers also differed over the division. In the Commons exchange of 15 August 1921, the British prime minister confirmed that the League Council had been invited to express an opinion on the line the principal powers should lay down. That wording identifies a referral for advice rather than proof that the League had already completed every decision or safeguard.
Explain what referral could contribute
Referral offered another institutional route where the earlier decision-makers had not reached agreement. Investigation and negotiation could help frame a division and arrangements for its consequences. The eventual result must nevertheless be examined separately from the announcement of referral. A parliamentarian’s question and a minister’s expectation establish the position at that date, not the views of every locality or the successful operation of every later protection.
Sources for this lesson
- Cambridge History 9489 · 2027–2029 · enquiry 8.2 p. 33 · official Version 2 PDF retrieved; selected enquiry and rotation pages checked with the April 2025 update
- Cambridge History 9489 · 2027–2029 update · Version 2 changes, April 2025
- UK Commons, 15 August 1921 · primary debate on Upper Silesia referral, Hansard; an announcement is not proof of later outcomes
- Polish Institute of National Remembrance · Upper Silesian plebiscite of 20 March 1921 · modern national institutional account of voting, not a neutral statement of all preferences
- Polish official legal archive · German-Polish Upper Silesia Convention signed at Geneva, 15 May 1922 · primary treaty publication
- League Covenant, Versailles Part I · primary text reproduced by UN Geneva; read the specified article and its conditions
Pause and explain
Which explanation best fits this lesson?
Worked example
Why did the aggregate result not define an undisputed boundary?
Show the worked solution
- Identify differing local results.
- Identify mixed communities and economic links.
- Explain the boundary choice still required.
Answer A regional majority did not show an identical preference in every locality or resolve how communities and industrial connections should be divided. Drawing a frontier required further choices, so the aggregate vote could not settle every competing claim by itself.
Try a topic test
Choose Easy, Normal or Difficult. Save your answers and open worked review after finishing.
Test this topic →From guided practice to a new situation
Write your answer and reasoning first. Use a hint only if you are stuck. The model solution is for self-checking; your written work is not automatically marked.
Guided: Why did the aggregate result not define an undisputed boundary?
Give me a hint
Connect a regional total with local distribution.
Compare my reasoning
- Identify differing local results.
- Identify mixed communities and economic links.
- Explain the boundary choice still required.
A regional majority did not show an identical preference in every locality or resolve how communities and industrial connections should be divided. Drawing a frontier required further choices, so the aggregate vote could not settle every competing claim by itself.
Look for these in your work
- Uses dated evidence and explains a causal or comparative connection
- Distinguishes a rule, institutional action, state cooperation and practical outcomes
Independent: What did the August 1921 parliamentary announcement establish?
Give me a hint
Read the action and its stage.
Compare my reasoning
- Identify the Council referral.
- Identify the opinion requested.
- Distinguish later decisions and implementation.
It established that the Council had been invited to express an opinion on the frontier for the principal powers to lay down. It did not prove that partition had already been implemented or that every later economic and minority protection was working.
Look for these in your work
- Uses dated evidence and explains a causal or comparative connection
- Distinguishes a rule, institutional action, state cooperation and practical outcomes
Transfer: Why did Upper Silesia require more than a plebiscite?
Give me a hint
Combine the vote, its geography and later choices.
Compare my reasoning
- Explain the local distribution of preferences.
- Explain economic stakes and violence.
- Explain referral after Allied disagreement.
The consultation produced results that had to be translated into a frontier through a mixed and industrially connected region. Violence and disagreement among the Allies complicated those choices. Referral to the League offered an additional route, but the resulting boundary and practical arrangements still required separate decisions and implementation.
Look for these in your work
- Uses dated evidence and explains a causal or comparative connection
- Distinguishes a rule, institutional action, state cooperation and practical outcomes
Common mistakes
- The 20 March 1921 vote was under inter-Allied arrangements, not independent League administration.
- Referral in August was not proof that every later safeguard had already succeeded.
What can you explain now?
Which explanation best fits this lesson?
Compare with the explanation
Distinguish the inter-Allied plebiscite, its local distribution and the later League referral
The 20 March 1921 plebiscite was inter-Allied. A regional total, local preferences, a referral and a completed settlement are different stages.
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Make it stick
Which explanation best fits this lesson?
If you needed the solution, close it and solve the problem again from a blank page. A correct answer is stronger when you can explain the reason for each step.