Comprehensive notes on world history by Frank E. Smitha.

The Middle Ages

China
Sui, Tang and Sung China.
Japan
Japanese Buddhism and military aristocracy.
Islam expands
Omar II, the Abbasids, Sufism.
Hinduism and Muslims
Harsha. Bhakti movement. Muslim invasion.
Europe 12/13th century
Economic growth. The Church. Crusades. Heresies. Universities
Mongol Conquests
Genghis Khan, Kublai Khan. The Mongols into China, Europe, Mesopotamia.
China and the Mings
Rebellion against Mongols, naval expeditions under the Mings.
Africa
Aksum to 800. Ghana and Mali. Empire in Ethiopia, Zimbabwe.
The Americas
Maya, Teotihuacan, Aztecs. Incas. Eskimos and others north of the Rio Grande.