Teschen: claims, communications and the deciding powers
Explain the Polish-Czechoslovak dispute while distinguishing the Allied boundary decision from later League involvement.
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 was the proposed plebiscite not a completed vote?
- Who adopted the 28 July 1920 boundary decision?
- What makes Teschen a difficult case for a simple League success scorecard?
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 · Teschen: claims, communications and the deciding powers
[1] Original analytical teaching prose, not a quotation or contemporary source. Explain the Polish-Czechoslovak dispute while distinguishing the Allied boundary decision from later League involvement.
1. What makes Teschen a difficult case for a simple League success scorecard?
Compare after trying
Teschen is difficult to classify through a simple League success label because the territorial problem involved several institutions and stages. Imperial collapse created competing claims by Poland and Czechoslovakia over a region where national affiliations, economic resources and communications mattered. A line could address interstate jurisdiction while creating difficult consequences for communities and administration.
The procedure also changed. A plebiscite had been envisaged, but the July 1920 agreement explained that attempts to implement it had not produced the intended result. The parties accepted determination by the principal Allied powers, and the Conference of Ambassadors adopted the boundary decision on 28 July. Calling that decision a League plebiscite or Council award misidentifies both the method and the responsible body.
Later League and judicial attention must therefore be connected with, rather than substituted for, the earlier settlement. The line, nationality arrangements and continuing disputes require separate examination. The case can illuminate international efforts to manage a difficult boundary without proving that one institution alone solved every aspect or that all affected people consented. An accurate evaluation identifies who acted, what was decided and how that decision operated.
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 problem after imperial collapse
The former Habsburg territory of Teschen, also known as Cieszyn or Těšín, was claimed by Poland and Czechoslovakia after the war. National affiliations, economic resources and communications made the stakes more complicated than simply drawing a line around one homogeneous population. A boundary could affect communities as well as access and administration. The national case advanced by one government should therefore be distinguished from an uncontested description of every inhabitant’s preference.
Follow the abandoned plebiscite proposal
A decision in September 1919 had envisaged a plebiscite in the disputed territories. The agreement reproduced in Harrison’s July 1920 telegram stated that attempts to carry it out under the intended conditions had not produced a result. Poland and Czechoslovakia then agreed at Spa that the principal Allied powers should determine their frontiers in the relevant areas. A planned vote must not be described as a completed League plebiscite.
Identify the actual decision-maker
The Conference of Ambassadors adopted the boundary settlement of 28 July 1920 for Teschen, Spisz and Orava under Allied authority. The text provided for a boundary commission to mark the frontier and allowed specified local modifications. This was not simply a League Council award. Later League attention to remaining questions is part of the history, but it should not replace the institution and date responsible for the earlier division.
Distinguish a line from all its consequences
The settlement also addressed nationality and options under defined conditions. A diplomatic decision could establish a legal line while leaving communities divided or governments dissatisfied. A statement by an official that the matter was settled should be read in its procedural sense and compared with later disputes and implementation. Assess the boundary, institutional roles and human consequences separately rather than count every territorial agreement as the same kind of League success.
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
- Harrison to Secretary of State, 29 July 1920 · translated text of the Teschen agreement, FRUS; the Conference of Ambassadors is the deciding body
- FRUS 1920 Volume I · Teschen dispute document sequence · editorial chronology and linked primary documents, not one undifferentiated decision
- PCIJ, Jaworzina advisory opinion, 6 December 1923 · selected primary English transcription at WorldCourts, including Council request and conclusion; original French text was authoritative
Pause and explain
Which explanation best fits this lesson?
Worked example
Why was the proposed plebiscite not a completed vote?
Show the worked solution
- Identify the earlier proposal.
- Identify the reported failure to implement it.
- Identify the replacement decision process.
Answer The agreement stated that the intended plebiscite process had not produced the required result, after which the parties accepted Allied determination. A proposal is not a completed vote, and the resulting division must not be relabelled a League-run plebiscite.
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 was the proposed plebiscite not a completed vote?
Give me a hint
Follow the process into the July 1920 agreement.
Compare my reasoning
- Identify the earlier proposal.
- Identify the reported failure to implement it.
- Identify the replacement decision process.
The agreement stated that the intended plebiscite process had not produced the required result, after which the parties accepted Allied determination. A proposal is not a completed vote, and the resulting division must not be relabelled a League-run plebiscite.
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: Who adopted the 28 July 1920 boundary decision?
Give me a hint
Name the institution rather than use a general international label.
Compare my reasoning
- Identify Allied authority.
- Identify the Conference of Ambassadors.
- Separate later League involvement.
The Conference of Ambassadors adopted the decision under the authority of the principal Allied powers. Later involvement by the League and the Court addressed subsequent questions; it does not make the original division a League Council decision.
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: What makes Teschen a difficult case for a simple League success scorecard?
Give me a hint
Separate institutions, stages and affected interests.
Compare my reasoning
- Explain the competing claims.
- Identify the Allied decision.
- Retain later questions and community effects.
The dispute combined competing national, economic and administrative interests, and the initial division was adopted by the Conference of Ambassadors rather than the League Council. Later League and judicial involvement concerned further questions. A useful judgement distinguishes these stages and examines implementation instead of counting the entire history as one uniform League victory.
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 Conference of Ambassadors adopted the July 1920 boundary decision.
- A proposed plebiscite did not become a completed League-run vote; later League involvement is a separate stage.
What can you explain now?
Which explanation best fits this lesson?
Compare with the explanation
Distinguish the planned vote, the Allied July 1920 division and later League involvement
The Conference of Ambassadors decided the boundary after the plebiscite proposal did not proceed as intended. Later League and Court activity belongs to later 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.