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Pick a unit to drill it head-on. Each unit has 4 different test variations so you can keep retaking until you master it.
States and societies in Afro-Eurasia from 1200–1450.
9 questions · ~14 minsmall bank — variations may overlap
Silk Roads, Indian Ocean, trans-Saharan trade, and the Mongols.
9 questions · ~14 minsmall bank — variations may overlap
Ottoman, Safavid, Mughal, Russian, Ming/Qing empires and their interactions.
8 questions · ~12 minsmall bank — variations may overlap
Maritime exploration, Columbian Exchange, Atlantic slave trade, and global commerce.
9 questions · ~14 minsmall bank — variations may overlap
Enlightenment, political revolutions, industrial revolution, and imperialism.
10 questions · ~15 minsmall bank — variations may overlap
World Wars, decolonization, Cold War, post-1945 globalization, and the 21st century.
10 questions · ~15 minsmall bank — variations may overlap
How unit tests work