History
Eastern Europe has been the site of conflict and violence for centuries. The region has been invaded and conquered by a variety of empires, including the Roman Empire, the Ottoman Empire, and the Russian Empire. These invasions have left a legacy of ethnic and religious diversity, which has contributed to the region's instability.
Geography
Eastern Europe is located at the crossroads of Europe and Asia. This makes the region a strategic prize, as it is a gateway between the two continents. The region's geography also makes it difficult to defend, as it is crisscrossed by rivers, mountains, and forests.
Geopolitics
Eastern Europe has been the scene of great power competition since the end of World War II. The United States and the Soviet Union vied for control of the region, and this competition often led to conflict. After the collapse of the Soviet Union, the region became even more unstable, as new nation-states emerged and struggled to find their place in the world.
All of these factors have contributed to making Eastern Europe a shatterbelt. The region is a complex and volatile mix of ethnic, religious, and geopolitical tensions, and it is likely to remain a source of conflict for years to come.