2. Before the war, Kim Il-Sung informed the Soviet Union and China of his plan to invade

Correct answer is South Korea.

Explanation:

Kim Il-Sung was a prime minister of North Korea who was an ally of both China and Soviet Union.

Therefore, before the famous Korean War started he informed his allies about this plan. Historians were doubting whether even the attack on South Korea was a Soviet plan, but it was obviously created by Il-Sung.

raw information is your answer

~courtney