Why was control of the atlantic ocean essential to great britain's success in world war II?

Britain was an island nation dependent "on shipping for the supplies it needed." Without access to Atlantic shipping lanes, Britain would have starved and been without war supplies from the Americans.

Support and supplies

Explanation:

In the beginning of wwll America would give supplies to great Britain and to Germany so controlling the Atlantic stoped Germany of getting supplies.

the map that was shown mostly had eastern asia highlighted. the answer would mostly likely be "the spread of communism into eastern asia set the stage for the korean war."

hopefully this .