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Europe_History World War I Roman Germanic Slav Russian Empire
12-26
Catherine Wu Zetian Peter the Great Menshkov Russian Empire
12-25
Sacrifice to heaven Vietnam_History Nguyen Chao Bao the Great dynasty Nguyen Phuc Thieu Nguyen Dynasty Russian Empire monarch Temple of Heaven Sino-Japanese War
12-18
Moscow Soviet_History saint petersburg Peter I Principality of Moscow Russian Empire
12-16
Outer Mongolia Gardan Central Plains Steppe Empire Genghis Khan Russian Empire
History of Lithuania History of Poland Soviet_History Russian Empire Europe_History grand duchy