I think that the question is about 1990s specifically (in 1900 it was not independent, but part of the Austrian Empire) and the country is Czechoslovakia.
It split into Czech Republic (now also called Czechia, also officially) and into Slovakia: today two independent countries and part of the EU
Answer:
27 is Treaty of Versailles
Explanation:
The Treaty of Versailles punished Germany after World War I by forcing them to pay massive war reparations, cede territory, limit the size of their armed forces, and accept full responsibility for the war.