Which event led to the oil embargo on the United States?

The Yom Kippur War, which occurred in October 1973, was the event that led to the oil embargo on the United States. This conflict involved Egypt and Syria launching a surprise attack on Israel during a significant Jewish holiday. In response to U.S. support for Israel, the Organization of Arab Petroleum Exporting Countries (OAPEC) declared an oil embargo against the United States and other nations that sided with Israel. This decision resulted in significant oil shortages and rising fuel prices in the U.S., highlighting the geopolitical impact of Middle Eastern conflicts on global oil supply and prices.

The other events listed did not lead directly to an oil embargo. The Gulf War in 1990 primarily concerned Iraq's invasion of Kuwait and garnered a multinational military response but did not lead to an embargo of oil on the U.S. itself. The 9/11 attacks in 2001 ushered in heightened security measures and led to conflicts in Afghanistan and Iraq, yet they didn't create an oil embargo. The Iranian Revolution in 1979 did disrupt oil supplies, but it was separate from the specific embargo resulting from the Yom Kippur War.