What current branch of the u. s. military was a corps of only 50 soldiers when world war i broke out?

Why would the saudi’s oil industry need a large investment in human capital

This photo shows an early mesoamerican structure, specifically from the zapotec culture. what was this structure most likely used for? a.creating terraces for farm fieldsb.practicing religious ceremoniesc.playing a ball game with stone hoopsd.protecting a city from invading armies

The northwest ordinance guaranteed three rights for the settlers of the northwest territory. what were they?