Instead of directly declaring war on each other two opposing nations will often use a war in a third nation to push there agents what the name for this kind of war called

Proxy war

Explanation:

Proxy war is a war that could occasion between two states typically caused by a party who is just an instigator of hostilities, that necessitate such war. Here, a track record is always established between the disinterested and bellicose nations.

A typical example of a problem proxy war is the cold war that occasioned after the end of the world war two. United State of America is a strong participant in such proxy affairs. Participants here struggle to establish their influence using proxies as tools and cannon folders for settling scores.

what are two things that greatly the american economy after the war? the huge buildup of u.s. military the beginning of the korean conflict the creation of the gi bill the marshall plan for nations