LA Timeline

math

Sumerians divide hour into 60 minutes

3000 B.C.

Sumerians divide minute into 60 seconds

3000 B.C.

Egyptians use calendar with 365 days

2773 B.C.

Babylonians have multiplication tables

1800 B.C.

First recorded mention of symbol for zero, in India

900 B.C.

War

Aborigines in Australia paint on stone portrayal of organized warfare

9997 B.C.

Cave paintings in Spain show bows in use

9996 B.C. - 5000 B.C.

Bronze (mix of tin and copper) tools common in Middle East

3000 B.C.

Chariots in Mesopotamia

3000 B.C.

Sumer has fully articulated military

2700 B.C.

Stele of Vultures shows war with phalanxes

2525 B.C.

Fortified cities are the norm in Mesopotamia

2500 B.C.

Copper helmets with leather liners common in Sumerian army

2500 B.C.

Battering ram developed to counter fortifications

2500 B.C.

Sargon the Great first great military dictator

2300 B.C.

Hittites begin smelting iron

1900 B.C.

Bronze metalworking spreads through Europe

1800 B.C.

Hittites first employ iron for weapons

1300 B.C.

Science

Wheels in Mesopotamia

4000 B.C.

Pharaoh Atothis writes first book about human body

3000 B.C.

Egyptians performing surgery, and some patients live

2500 B.C.

Chinese record sighting of comet

2296 B.C.

First zoo has opening day, in China

2000 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.

Trojan War (between Troy and Mycenae)

1190 B.C.

Age of Darkness in Aegean area

1100 B.C. - 800 B.C.

Mycenae falls to invaders

1100 B.C.

Homer writing

750 B.C.