Orson Welles, the actor and director who would revolutionize American cinema and radio drama, was born in Kenosha, Wisconsin.

Allied commanders finalized plans for the amphibious assault on the Gallipoli peninsula, setting in motion a campaign that would cost hundreds of thousands of lives.

Ottoman authorities arrest and execute hundreds of Armenian intellectuals and community leaders in Constantinople, marking the genocide's start.

Allied troops, including thousands of Australian and New Zealand soldiers, stormed the beaches of Gallipoli, Ottoman Turkey, launching a campaign that would define ANZAC identity.

The RMS Lusitania departed New York for Liverpool despite German warnings, on a voyage that would end six days later in a U-boat attack off Ireland.

Germany's embassy published a warning in American newspapers cautioning travelers against sailing on British ships, days before the Lusitania sailed.

A German U-boat sank the British liner Lusitania off Ireland, killing 1,198 people and inflaming American opinion against Germany.

German embassy officials warned that ships flying enemy flags in war zones did so at their own risk, days before the Lusitania sailed.

The American Museum of Natural History unveiled the first mounted Tyrannosaurus rex skeleton, transforming the dinosaur into a global icon.

German firing squad executed British nurse Edith Cavell in Brussels for helping some 200 Allied soldiers escape occupied Belgium during World War I.