The institution of different communities of Indo-Europeans lead to the evolution of different words and ways of speaking, but much of the primary grammar and speech reserved. The primitive land of Indo-Europeans was built between 4500 and 2500 B.C.E. where today's Ukraine and southern Russia stand. The early Indo-Europeans existed mainly by herding various animals and hunting, observing and domesticating horses. The domestication of horses created a huge advantage for the Indo-Europeans as they used them to exploit grasslands, for transportation, and military power. (Bentley, 54-55).
The domestication of horses afforded Indo-Europeans the ability to expand a great distance beyond their primitive land. Population boomed as Indo-Europeans resided in southern Russia, leading many to disperse eastbound. The first Indo-European society dispersed in 3000 B.C.E., the progressive continence of migration lead until 1000 C.E. The Hittites were the most significant migrants of those of the Indo-Europeans. The Hittites migrated to the innermost plain of Anatolia after 2000 B.C.E., enforcing their identity, language and reign until a little after 1200 B.C.E., when the state collapsed. During this time they built a kingdom (1700-1600 B.C.E.), adopted cuneiform writing to their language(1700-1600 B.C.E.), dominated power in southwest Asia (1595 B.C.E.), and extended power through eastern Anatolia, northern Mesopotamia, Syria and Phoenicia (1450-1200 B.C.E.). (Bentley, 55-56).
Indo-European migrants, the Hittites, improved war chariots, the refinement of iron metallurgy and the established the Caste System. Indeed, the Sumerian armies had the idea of chariots, but they lacked in an effective model. Around 2000 B.C.E. the Hittites developed a chariot that weighted less, was quicker and proved to be a military advantage as they took over the central plain of Anatolia. With time, chariot warfare became a widespread technological innovation for many armies across the ancient world.