Final answer:
After WWI, the Russian, Austro-Hungarian, and Ottoman Empires ceased to exist, paving the way for new countries such as Poland, Czechoslovakia, and Yugoslavia to emerge based on the Treaty of Versailles and related agreements.
Step-by-step explanation:
Countries That No Longer Existed After WWI
Following the conclusion of World War I, the geopolitical landscape of Europe witnessed a significant transformation.
Three of the largest and oldest empires dissolved: the Russian Empire, the Austro-Hungarian Empire (Habsburg Empire), and the Ottoman Empire. As a result of these disintegrations, new countries were established, and national boundaries were redrawn.
New Countries Formed After WWI
The Treaty of Versailles and other post-war agreements led to the creation of several new nations. Notably, Poland re-emerged as a sovereign nation after years of partitions
Czechoslovakia and Yugoslavia were also established as new states, manifesting the shift toward self-determination and national sovereignty that characterized post-WWI restructuring.
Countries gained former German colonies, new Republics emerged, and territories were subject to mandates under the control of victor nations like France and Great Britain.
These changes, including the founding of new countries, reshaping of borders, and dissolution of empires, profoundly affected the social, cultural, and political climate of the period between World War I and World War II, setting the stage for future conflicts.