April 19, 1775: At about 5 a.m., 700 British troops, on a mission to capture Patriot leaders and seize a Patriot arsenal, march into Lexington to find 77 armed minutemen under Captain John Parker waiting for them on the town’s common green. British Major John Pitcairn ordered the outnumbered Patriots to disperse, and after a moment’s hesitation, the Americans began to drift off the green. Suddenly, a shot was fired from an undetermined gun, and a cloud of musket smoke soon covered the green. When the brief Battle of Lexington ended, eight Americans lay dead or dying and 10 others were wounded. Only one British soldier was injured, but the American Revolution had begun.

George Gordon Byron, 6th Baron Byron, dies in what is now Greece, where he had traveled to support the Greek struggle for independence from Turkey. Even today, he is considered a Greek national hero.

Union Colonel Abel Streight begins a raid into northern Alabama and Georgia with the goal of cutting the Western and Atlantic Railroad between Chattanooga, Tennessee and Atlanta. The raid ended when Confederate General Nathan Bedford Forrest captured Streight’s entire command near Rome, Georgia.

On April 19, 1897, John J. McDermott of New York won the first Boston Marathon with a time of 2:55:10.

In Warsaw, Poland, Nazi forces attempting to clear out the city’s Jewish ghetto are met by gunfire from Jewish resistance fighters, and the Warsaw Ghetto Uprising begins.

As a prelude to a massive antiwar protest, Vietnam Veterans Against the War begin a five-day demonstration in Washington, D.C. The generally peaceful protest, called Dewey Canyon III in honor of the operation of the same name conducted in Laos, ended on April 23 with about 1,000 veterans throwing their combat ribbons, helmets, and uniforms on the Capitol steps, along with toy weapons. Earlier, they had lobbied with their congressmen, laid wreaths in Arlington National Cemetery, and staged mock “search and destroy” missions.

On April 19, 1989, a 28-year-old female investment banker is beaten and sexually assaulted while jogging in New York City’s Central Park. Five teenagers from Harlem were wrongly convicted of the crime, which shocked New Yorkers for its randomness and viciousness and became emblematic of the perceived lawlessness of the city at the time. The case was also racially charged, as the teens were Black and Hispanic and the victim was white.

Just after 9 a.m. on April 19, 1995, a massive truck bomb explodes outside the Alfred P. Murrah Federal Building in Oklahoma City, Oklahoma. The blast collapsed the north face of the nine-story building, instantly killing more than 100 people and trapping dozens more in the rubble. Emergency crews raced to Oklahoma City from across the country, and when the rescue effort finally ended two weeks later the death toll stood at 168 people killed, including 19 young children who were in the building’s day-care center at the time of the blast.