Historical spread of the chariot. This map combines various classes of information, historical and archaeological. The 'isochrones' as given should not be considered more than rough approximations, give or take a century.

• red, 2000 BC: area of the earliest known spoke-wheeled chariots (Sintashta-Petrovka culture)
• orange, 1900 BC: extent of the Andronovo culture, expanding from its early Sintashta-Petrovka phase; spread of technology in this area would have been unimpeded and practically instantaneous
• yellow, 1800 BC: extent of the great steppes and semi-deserts of Central Asia, approximate extent of the early Indo-Iranian diaspora at that time. Note that early examples of chariots appear in Anatolia as early as around this time.
• light green, 1700 BC: unknown, early period of spread beyond the steppes
• green/cyan, 1600-1200 BC: the Kassite period in Mesopotamia, rise to notability of the chariot in the Ancient Near East, introduction to China, possibly also to the Punjab and the Gangetic plain (Rigveda) and E and N Europe (Trundholm Sun Chariot), assumed spread of the chariot as part of Late Bronze Age technology
• blue, 1000-500 BC: Iron Age spread of the chariot to W Europe by Celtic migrations