'Invade vital regions' comes from the Anime/Manga: Hetalia. 'Invading vital regions' would just be a fancier way of saying having sex or rape.
It was invaded by Hyksos, Sea people, Hittites, Greek, Persians, ...
Persians
The Hittite civilization's population is estimated to have been around 15,000 to 40,000 people during its peak in the Late Bronze Age. This population was mostly concentrated in the core areas of the Hittite Empire, such as the capital city of Hattusa and other urban centers.
Hittites
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They were from modern day Turkey (Anatolia, Asia Minor)
yes, the Hittites did have kings in the ancient world
Flanders and Walloons are Belgium's two language regions.
1: Chariots 2: Iron weapons
Ramses the great made a treaty with the hittites
The Hittites went out to war against the Ammorites.