Answer:
Communications and Transport.
Telegraph.
Aerial reconnaissance.
Railroads.
Army ambulance corps.
Weapons and Ships.
Long-Range Weapons and the Minie Bullet.
The Gatling Gun.
The traditional view is that the shift to agricultural food production supported a denser population, which in turn supported larger sedentary communities, the accumulation of goods and tools, and specialization in diverse forms of new labor
Even if we can't know for sure, we know Native Americans were certainly here before Europeans. Before the Natives there were indigenous peoples who spoke languages that have become extinct. They lived in western "United States", and before them, who knows?
<span> </span>created<span> after the First World War to provide for resolving international disputes.</span>
Answer :
Mound builders, agriculture, hunting, crops.