WHEN Major Empires Appear (Time Period = KEY):
1200–1450 (Units 1–2):
Song China
Abbasid Caliphate
Delhi Sultanate
Mongol Empire
Great Zimbabwe / Mali Empire
Feudal Japan / Europe
1450–1750 (Units 3–4):
Ottoman Empire
Safavid Empire
Mughal Empire
Russian Empire (early)
Ming → Qing Dynasty (China)
Tokugawa Shogunate (Japan)
Spain/Portugal (colonial empires)
British/French/Dutch (start of maritime empire building)
1750–1900 (Units 5–6):
British Empire (height) / Raj in India
French Empire / Revolution / Napoleon
Germany and Italy (nationalism & unification)
Ottoman decline begins
Meiji Japan (starts 1868)
US/Latin America: Revolutions & industrial rise
1900–Present (Units 7–9):
US, USSR, Japan, Germany, Britain (global powers)
Decolonization empires: Britain, France, Belgium collapse in Africa/Asia
China: Qing falls → Republic → Maoist state → modern state
Pro Tips for Time-Based Elimination:
If you see Ottomans and Industrialization together → WRONG TIME (Ottomans decline during industrial age)
If the question mentions Silk Roads and gunpowder → be careful. Silk Roads = pre-1450, gunpowder empires = post-1450
Columbian Exchange = only after 1492
Cold War conflicts = AFTER WWII, so not 1930s or before