The Assyrian army was the first <span>to use iron</span> in its weapons .
It was that "Flat land with poor drainage led to salinization from irrigation waters," that was a factor in the decline of Sumer, since this led to a build up of salt in the soil, which greatly reduced agricultural output.
The Roman empire reached its peak under the leadership of Trajan in 116 A.D
the empire endured great prosperity during the Pax Romana.
Answer:
Unemployment rose
Homelessness increased
International Trade collapsed
Explanation:
New inventons that changed American society during the late 1800's are steam power and electricity. The railroad helped expand the U.S.. The telegraph, the telephone, and the typewriter brought people together that were far away.