I believe the answer is: Fertile Crescent
Fertile Crescent is a term that used to described a region where human civilizations could thrive due to its capability to sustain many agricultural products. In most cases, this region possess both soil with high amount of nutrients and located not far from a water source.
The US forces passing the 38th parallel would be your answer.
Hundred Days' Reform. The Hundred Days' Reform was a failed 103-day national, cultural, political, and educational reform movement from 11 June to 22 September 1898 in late Qing dynasty China. It was undertaken by the young Guangxu Emperor and his reform-minded supporters.
HOPE THIS HELPED!! XD
I would guess gathering food and hunting, although sleeping might also be N1
