 | On this day in history, May 20
The first publication discussing the AIDS virus was published, a famous battle of the Vietnam War was completed, and the first prisoners arrived at a notorious concentration camp during WWII.
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 | On this day in history, May 17
A major piece of the United States stock system was established; a landmark decision was made by the U.S. Supreme Court; and the first state took action to legalize same-sex marriages.
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 | On this day in history, May 16
The first Oscars in history were handed out, President Andrew Johnson was acquitted in his impeachment trial, and the Space Shuttle Endeavor made its final flight.
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 | On this day in history, May 15
After more than eight years of fighting the Red Army begins its withdrawal from Afghanistan, Gov. George Wallace was shot, and McDonald's opened it's first restaurant.
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 | On this day in history, May 14
Israel took action in 1948 that would immediately trigger a war in the Middle East, several demonstrators were beaten in 1961 during a civil rights protest, and the U.S.'s first space station was launched in 1973.
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 | On this day in history, May 13
A now-common household item was first trademarked in 1958, Johnny Carson made his final television appearance in 1994, and the U.S. declared war on Mexico in 1846.
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 | On this day in history, May 10
The first Transcontinental Railroad is completed in Utah, an assassination attempt is carried out against President George W. Bush, and Mother's Day was observed for the first time in the U.S.
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 | On this day in history, May 9
A massive earthquake with a magnitude of nearly 9.0 struck in Peru, U.S. Congress officially opens impeachment proceedings against President Nixon over the Watergate Scandal, and a bank robbery triggered one of the largest police pursuits in California history.
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 | On this day in history, May 8
Coca-Cola makes its first appearance being sold at a pharmacy as a patent medicine, one of the biggest film studios in Hollywood was founded in 1912, and the Soviet Union announced it would not participate in the 1984 Summer Olympics.
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 | On this day in history, May 7
Nazi Germany's involvement in World War II officially ended, the 27th amendment to the U.S. Constitution is finally adopted over 200 years after it was introduced, and nearly 130 Americans died in a famous German attack during World War I.
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