In World War II, Pearl Harbor was attacked, American LAND.
In the Korean war, NATO enforced Democracy on South Korea, and China/USSR enforced Communism on PRK. From the point of 1945-1991, it was a war of influences, not a war of arms. In 1991-92, an ally, provider of Oil and a powerless country was being attacked, a American Led NATO, backed up Kuwaiti Non-existent defenses. If we wanted Oil from Iraq, we would have taken it in 1991-92 since we already had the justification of war.