What was a chief issue when applying self-determination to Eastern Europe after WWI?

• A. Borders were drawn solely based on ethnic majorities in each area.
• B. Minorities were universally granted full independence in all new states.
• C. All borders remained unchanged to preserve stability.
• D. Borders were drawn primarily on strategic and political lines, often ignoring minority rights.

Answer: (D)

The central idea being tested is how self-determination played out in practice after World War I. In Eastern Europe, the mapmakers faced a tension between the ideal of letting national groups govern themselves and the realities of security, power, and viability. The result was that borders were drawn mainly to serve strategic and political aims—creating buffer zones, ensuring access to ports and resources, and satisfying great-power interests—rather than strictly aligning with ethnic or national identities. This often left sizable minority populations inside new states, who did not feel fairly represented and who had reason to resist or push for autonomy, contributing to long-term instability.

For example, new borders separated communities and left Germans, Hungarians, Ukrainians, and others as minorities in several states, while Poland’s new configuration granted access to the sea but cut through East Prussia and mixed populations along its borders. Such arrangements illustrate why borders prioritized strategic considerations over ethnic self-determination, leading to ongoing minority tensions and disputes even as the principle of self-determination was promoted.