Today in History: December 18, Donald Trump impeached for the first time

Today is Thursday, Dec. 18, the 352nd day of 2025. There are 13 days left in the year.

Today in history:

On Dec. 18, 2019, the U.S. House impeached President Donald Trump on two charges, sending his case to the Senate for trial (It was the first of two Trump impeachment trials that would end in acquittal). The articles of impeachment accused him of abuse of power to investigate Democratic rival Joe Biden before the 2020 election and obstructing Congress' investigation of the matter.

Also on this date:

In 1865, the 13th Amendment to the Constitution abolishing slavery was declared in effect by Secretary of State William H. Seward.

In 1892, Peter Ilyich Tchaikovsky's ballet ''The Nutcracker'' publicly premiered in St. Petersburg, Russia; although now considered a classic, it received a generally negative reception from critics.

In 1916, the Battle of Verdun, World War I's longest at 10 months, ended between French and German forces; it led to nearly 1 million casualties.

In 1957, the world's first commercial nuclear power plant, the Shippingport Atomic Power Station in Pennsylvania, began supplying electricity to customers. (It was taken out of service in 1982.)

In 1972, with peace talks stalled, the U.S. launched Operation Linebacker II, its heaviest bombing of North Vietnam in the Vietnam War. The operation lasted 11 days (an agreement known as the Paris Peace Accords was signed in January 1973.

In 2011, the last convoy of heavily armored U.S. troops left Iraq in the final moments of a nearly nine-year war.

In 2022, Argentina beat France 4-2 in a penalty shootout to claim a third World Cup, the first for star Lionel Messi.

In 2023, Pope Francis approved letting Catholic priests bless same-sex couples under certain conditions, a radical shift in policy that aimed to make the church more inclusive while maintaining its strict ban on gay marriage.