Question

what effect did the entrance of chinese troops have on the korean war?
successive chinese victories demoralized american troops and led to mass desertions.
the entrance of china encouraged the soviet union to send in hundreds of thousands of troops on the north korean side.
it provided a decisive victory for the communist side that led to the spread of communism on the whole peninsula.
it initially turned the tide of the war against un and american forces, eventually leading to a stalemate.

Explanation:

When Chinese troops entered the Korean - War, their surprise attacks and effective combat initially reversed the war situation against the UN and American forces. The war did not lead to mass desertions of American troops as claimed in the first option. The Soviet Union did not send in hundreds of thousands of ground troops. And the war ended in a stalemate rather than a decisive Communist - side victory that spread Communism across the whole peninsula.

Answer:

It initially turned the tide of the war against UN and American forces, eventually leading to a stalemate.