Time Line

Math

Sumerians divide circle into 360 degrees

3000 B.C

Sumerians divide day into 24 hours

3000 B.C

Sumerians divide hour into 60 minutes

3000 B.C

Sumerians divide minute into 60 seconds

3000 B.C

Egyptians use calendar with 365 days

2733 bc

War

Shruppak (Sumer) tell of city-states equipping 600-700 soldier armies full time

2600 bc

Copper helmets with leather liners common in Sumerian army

2500 bc

Sargon's army of 5,300 is big for the time

2300 bc

Minoans overrun by mainland Greeks

1450 bc

Trojan War

1190 bc

Troy

Troy inhabited

3000 bc

Mycenae (Greece) flourishes

1600 bc

Mycenae dominates Aegean

1450 bc

Mycenae falls to invaders

1100 bc

Homer writing

750 bc

Science

Bread in Egypt

3500 B.C

Chinese make silk

2700 BC

Egypt's first pyramid, at Saqqara, by Pharaoh Djoser

2630 bc

Paved highway in Egypt

2600 B.C

Khufu's Great Pyramid at Giza Made

2550 bc