What was the most significant american contribution to the allied cause before 1942? ?

a. air support for allied troops
b. military ground force in the pacific
c. war materials leased to allied forces
d. atomic research of the manhattan project

australian plates collided into eurasian plates, and the himalayas formed. the andes mountain range the himalayas and the islands of japan form differently. the andes mountain range formed at the convergent boundary of an oceanic plate and continental plate.

the first two years of american revolution was not very encouraging for the patriots since the british were far superior in sea power, arms and troops.