What were the purpose of the earthworks build by cultures of eastern north america

answer

wages and job opportunities have grown slowly since the recovery began five years ago, while technology continues to change the nature of work. while many workers enjoy opportunities unimaginable a generation ago, many others feel the economy has left them b

explanation:

on april 6, 1917, the u.s. joined its allies--britain, france, and russia--to fight in world war i. under the command of major general john j. pershing, more than 2 million u.s. soldiers fought on battlefields in france.