665 Days In Iraq

History
• Ancient Iraq
Iraq has the common epithet, the "Cradle of Civilization", as it was home to the earliest known civilization, the Sumerian civilization, which arose in the fertile Tigris-Euphrates river valley of southern Iraq in the Chalcolithic (Ubaid period). It was there in the late 4th millennium BC, that the world's first writing system and recorded history itself were born. The Sumerian civilization flourished for over 3,000 years and was succeeded by the rise of the Akkadian Empire in the 24th century BC. Over two centuries of Akkadian dominance was followed by a Sumerian Renaissance in the 21st century BC. An Elamite invasion in 2004 BC brought the Third Dynasty of Ur to an end. By the 18th century BC, a new civilization, Babylonia, had risen to dominance in central and southern Iraq while a contemporaneous state, Assyria, had formed in northern Iraq.
In the 6th century BC, Cyrus the Great of neighbouring Persia defeated the Neo-Babylonian Empire at the Battle of Opis and Iraq was subsumed into the Achaemenid Empire for nearly four centuries. In the late 4th century BC, Alexander the Great conquered the region, putting it under Hellenistic Seleucid rule for nearly two centuries. The Parthians conquered the region during the reign of Mithridates I of Parthia (r. 171–138 BC). From Syria, the Romans invaded the region several times. The Sassanid Persians under Ardashir I destroyed the Parthian Empire and conquered the region in 224 AD. The region was thus a province of the Persian Empire for four centuries, until the Muslim conquest of Persia in the 7th century.