Why might this parade of military equipment have taken place

A military parade is formation of alot of soldiers whose movement is restricted by close order drilling The military parade is now almost entirely ceremonial, though soldiers from time immemorial up until the late 19th century fought in formation. Massed parades may also hold a role for propaganda purposes, being used to exhibit the apparent military strength of one's nation.

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 .

because they had ajdjdjdjdndjjs