Troy

Math

Egyptians use calendar with 365 days

2773 B.C.

Khufu's Great Pyramid at Giza, 481 feet high

2550 B.C.

Babylonians have multiplication tables

1800 B.C.

Water clock in Egypt

1600 B.C.

First recorded mention of symbol for zero, in India

900 B.C.

War

Battering ram developed to counter fortifications

2500 B.C.

Hittites first employ iron for weapons

1300 B.C.

Trojan War (between Troy and Mycenae)

1190 B.C.

Mycenae falls to invaders

1100 B.C.

Age of Darkness in Aegean area Dorian and Ionian

1100 B.C.

Science

Wheels in Mesopotamia

4000 B.C.

Stone and wooden wheels widespread

3600 B.C.

Hieroglyphic writing in Egypt

3200 B.C.

Pharaoh Atothis writes first book on human body

3000 B.C.

Chinese record sighting of comet

2296 B.C.

Troy

Troy inhabited

3000 B.C.

Mycenae (Greece) flourishes

1600 B.C.

Mycenae dominates Aegean

1450 B.C.

Mycenae reaches its peak

1320 B.C.

Homer writing

750 B.C.