On March 18

Syrian civil war: The U.S. Air Force carried out an airstrike in al-Baghuz Fawqani, killing as many as 80, a disputed number of whom were civilians.

Gunmen attacked the Bardo National Museum in Tunisia, killing 24 people.

As per a court order, the feeding tube of Terri Schiavo, an American woman who suffered brain damage, was removed at the request of her husband, fueling a worldwide debate on euthanasia.

The deadliest fire in Philippine history broke out at a nightclub in Quezon City, causing 162 deaths.

Unidentified thieves stole thirteen works of art collectively valued at $500 million from the Isabella Stewart Gardner Museum (pictured) in Boston, Massachusetts.

The first episode of the soap opera Neighbours was broadcast on the Seven Network, later becoming the longest-running drama in Australian television history.

The punk group the Clash released their first single, "White Riot", described as their "most controversial song" due to its lyrics about class economics and race.

U.S. postal workers began an eight-day strike after Congress raised their wages by only 4 percent despite increasing its own pay by 41 percent.

Vietnam War: The United States began secretly bombing the Sihanouk Trail in Cambodia, used by communist forces to infiltrate South Vietnam.

Cosmonaut Alexei Leonov ventured outside the Soviet spacecraft Voskhod 2, becoming the first person to walk in space.

Tibetan uprising: After the 14th Dalai Lama sought refuge at Sera Monastery in Lhasa, Tibet, Chinese forces bombarded the monastery, inflicting severe destruction and killing hundreds of Buddhist monks.

The deadliest tornado in U.S. history spawned in Missouri and traveled more than 219 miles (352 km) across Illinois and Indiana, leaving one of the longest continuous tornado tracks ever recorded.

Russian Civil War: Bolshevik forces suppressed a rebellion of sailors and civilians in Kronstadt.

First World War: In one of the largest naval battles of the Gallipoli campaign, Ottoman forces sank three Allied battleships and severely damaged three others.

Romanian inventor Traian Vuia became the first person to fly a heavier-than-air monoplane (pictured) with an unassisted takeoff.

The construction of the House with Chimaeras (pictured) commenced in Kyiv.

Canadian governor general Lord Stanley of Preston pledged to donate an award to Canada's top-ranked amateur ice hockey club, now known as the Stanley Cup, the oldest professional sports trophy in North America.

The British soldier-explorer John Wood came close to rediscovering the ancient Greco-Bactrian city of Ai-Khanoum in modern Afghanistan.

Andreas Joseph Hofmann proclaimed the Republic of Mainz, becoming the first republican state in Germany.

Susenyos I was formally crowned Emperor of Ethiopia.