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May 18
ON THIS DAY

May 18

5 moments across history

1980

Mount St. Helens Eruption (1980)

Mount St. Helens Eruption (1980)

Event 2

Mount St. Helens Eruption (1980) — detail

Year: 1980

On May 18, 1980, Mount St. Helens erupted explosively in Washington state, killing 57 people and leveling hundreds of square miles of forest. The disaster was the deadliest and most economically destructive volcanic event in U.S. history, prompting a revolution in volcano monitoring and public safety protocols. Historically, it marked a turning point in volcanology, as scientists used continuous monitoring and real-time data to better predict eruptions and mitigate future risks.

1969

Apollo 10 Launch

Apollo 10 Launch

Apollo 10 Launch

Apollo 10 Launch — detail

Year: 1969

On May 18, 1969, Apollo 10 launched from Cape Kennedy, carrying astronauts Thomas Stafford, John Young, and Eugene Cernan on a mission that tested all lunar landing procedures except the actual descent to the Moon. This flight mattered because it verified the lunar module’s performance in orbit, communications, and navigation, ensuring the Apollo 11 crew could safely attempt the first Moon landing two months later. Historically, Apollo 10 was the final step in a decade-long effort driven by the Cold War space race, culminating humanity’s first footsteps on another world.

1953

Jackie Cochran Breaks the Sound Barrier

Jackie Cochran Breaks the Sound Barrier

Event 4

Jackie Cochran Breaks the Sound Barrier — detail

Year: 1953

On May 18, 1953, pilot Jacqueline Cochran flew a North American F-86 Sabre to become the first woman to break the sound barrier. Her achievement advanced aviation technology by proving supersonic flight was accessible to women and challenged gender barriers in aerospace, inspiring future female pilots and astronauts. This occurred during the Cold War era of rapid aerospace progress, following Chuck Yeager’s first supersonic flight in 1947, and Cochran had previously led the Women’s Airforce Service Pilots in World War II.

1944

Allied Capture of Monte Cassino

Allied Capture of Monte Cassino

Allied Capture of Monte Cassino

Allied Capture of Monte Cassino — detail

Year: 1944

On May 18, 1944, Allied forces finally captured Monte Cassino after a brutal four-month battle, breaking the German Gustav Line. This victory opened the road to Rome and marked a key turning point in the Italian campaign of World War II. The battle exemplified the costly, grinding nature of the Allied advance through heavily fortified mountain defenses.