Contrast the impact of migrations into Southwest Asia(Anatolia and Mesopotamia), Egypt, South Asia, and East Asia

Contrast the impact of migrations into Southwest Asia(Anatolia and Mesopotamia), Egypt, South Asia, and East Asia

The second millennium BCE witnessed large-scale migrations of nomadic peoples who brought with them their domesticated horses and their chariot technology.  These people are referred to by scholars as Indo-Europeans, largely on the basis of their languages (see Current Trends in World History:  How Languages Spread).  Contrast the impact of migrations into Southwest Asia(Anatolia and Mesopotamia), Egypt, South Asia, and East Asia.  To what extent did conflict play a role in the impact of Indo-European language speakers on the formation of territorial states?