The korean war began in 1950 when the
soviet union attacked south korea.
united nations invaded north korea.
communist north attacked the non-communist south.

The Korean War began when North Korea invaded South Korea. North Korea crossed the 38th parallel and invaded South Korea. The correct option to this question is the last option the one that says "Communist North attacked the non-Communist South."

the answer is: the sesquicentennial of the american civil war is an occasion to consider the legacy of that great conflict. this legacy is our inheritance, and despite many indelible features, we continue to negotiate the resolution of that conflict. the civil war was fought over slavery, but not always on behalf of slaves