The use of submarines during world war i had which of these effects? it gave an advantage to the coastal nations. it made naval battles the key battles of the war. it made it difficult for merchants to bring supplies to the allies. it prevented the central powers from transporting troops.

the answer that best explains what happened to george washington at fort necessity, pennsylvania is : washington was attacked by the french but was able to negotiate with them to peacefully end fighting. the battle took place on july 3, 1754. the battle is considered as being the start of the french and indian war.