Which contributions did mary edwards walker make to the war effort? check all that apply.
she cared for prisoners of war.
she tended to wounded soldiers.
she worked as a battlefield surgeon.
she trained other doctors and nurses.
she served as an officer in the military.
she fought in combat beside male soldiers.

a social contract.

"a social contract is an agreement between citizens and their leader where the citizens give up certain freedoms in exchange for protection. the constitution of the united states is an example of a social contract."

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.

a stronger central government  

its what they are

it was the first major victory for the colonists.