Unofficial ceasefires sprang up across World War I's Western Front.
The first feature-length silent film comedy, 'Tillie's Punctured Romance,' was released, starring Marie Dressler, Mabel Normand, and Charlie Chaplin.
The Safety Hood, which would later become the gas mask, was patented by Garrett Morgan.
The First Battle of the Marne began during World War I.
During World War I, Japan officially declared war on Germany.
President Woodrow Wilson issued a Proclamation of Neutrality.
The Defence of the Realm Act was introduced in Britain.
The first British troops arrived in France during World War I.
The first traffic lights in the US were installed in Cleveland, Ohio.
The United States of America declared neutrality at the beginning of World War I.
A patent was granted to Robert Goddard for a liquid-filled rocket.
Legendary baseballer Babe Ruth made his Major League Baseball debut for the Boston Red Sox.
Germany declared war on France and sent its first wave of troops to Belgium to start the attack.
The HMHS Britannic, sister to the RMS Titanic, was launched at Harland and Wolff shipyard in Belfast.
Frugal parents mailed their four-year-old child 73 miles from their home to the child's grandparents.
The Ford Motor Company announced that it would begin an eight-hour workday as well as provide a living wage for workers who would receive $5 a day.
