No, he did not die from a gas bomb. He did go through a gas bomb when he fought in WWI but survived it.
He killed himself to prevent being caught when everyone was hunting him down after the WWII ended
Nebuchadnezzar built or restored temples and hung royal palaces
The Euphrates River provided water for irrigation and mud bricks.
A veto enables the president to reject a bill passed by the legislature
The answer is iron. The Hittites learned to smelt and work with the element before any other civilization.
A, food surpluses.
Being nomadic means they would still be travelling.
Advanced hunting techniques only benefit the hunter, and who he shares with.
And monetary system deal with money.