On February 13, 1914, the American Society of Composers, Authors and Publishers (ASCAP) is founded to help music creators make a living from their work.

Ending a bitter coal-miners’ strike, Colorado militiamen attack a tent colony of strikers, killing dozens of men, women and children.

On May 9, 1914, President Woodrow Wilson issues a presidential proclamation that officially establishes the first national Mother’s Day holiday to celebrate America’s mothers.

Archduke Franz Ferdinand of Austria and his wife Sophie are shot to death by a Bosnian Serb nationalist during an official visit to the Bosnian capital of Sarajevo on June 28, 1914. The killings sparked a chain of events that led to the outbreak of World War I by early August.

On July 5, 1914, in Berlin, Kaiser Wilhelm II of Germany pledges his country’s unconditional support for whatever action Austria-Hungary chooses to take in its conflict with Serbia, a long-running rivalry thrown into crisis by the assassination, the previous June 28, of Archduke Franz Ferdinand of Austria and his wife by a Serbian nationalist during an official visit to Sarajevo, Bosnia.

Convicted of murder on meager evidence, the singing Wobbly Joe Hill is sentenced on July 8, 1914 to be executed in Utah.

On July 11, 1914, in his major league debut, George Herman “Babe” Ruth pitches seven strong innings to lead the Boston Red Sox over the Cleveland Indians (now known as the Cleveland Guardians), 4-3.

At six o’clock in the evening on July 23, 1914, nearly one month after the assassination of Austrian Archduke Franz Ferdinand and his wife by a young Serbian nationalist in Sarajevo, Bosnia, Baron Giesl von Gieslingen, ambassador of the Austro-Hungarian Empire to Serbia, delivers an ultimatum to the Serbian foreign ministry.

On July 28, 1914, one month to the day after Archduke Franz Ferdinand of Austria and his wife were killed by a Serbian nationalist in Sarajevo, Austria-Hungary declares war on Serbia, effectively beginning the First World War.

In the early hours of July 29, 1914, Czar Nicholas II of Russia and his first cousin, Kaiser Wilhelm II of Germany, begin a frantic exchange of telegrams regarding the newly erupted war in the Balkan region—and the possibility of its escalation into a general European war.

On August 1, 1914, four days after Austria-Hungary declared war on Serbia, Germany declares war on Russia and France orders a general mobilization. The following day, the first German army units cross into Luxembourg in preparation for an invasion of France. Over the next three days, Russia, France, Belgium and Great Britain all lined up against Austria-Hungary and Germany, and the German army invaded Belgium. The “Great War” that ensued was one of unprecedented destruction and loss of life, resulting in the deaths of some 20 million soldiers and civilians.

On the afternoon of August 3, 1914, two days after declaring war on Russia, Germany declares war on France, moving ahead with a long-held strategy, conceived by the former chief of staff of the German army, Alfred von Schlieffen, for a two-front war against France and Russia. One day earlier, France had begun readying its troops to move into the provinces of Alsace and Lorraine, which it had forfeited to Germany in the settlement that ended the Franco-Prussian War in 1871.

As World War I erupts in Europe, President Woodrow Wilson formally proclaims the neutrality of the United States, a position that a vast majority of Americans favored, on August 4, 1914.

The world’s first electric traffic signal is put into place on the corner of Euclid Avenue and East 105th Street in Cleveland, Ohio, on August 5, 1914.

On August 5, 1914, the German army launches its assault on the city of Liege in Belgium, violating the latter country’s neutrality and beginning the first battle of World War I.

The Panama Canal, the American-built waterway across the Isthmus of Panama, connecting the Atlantic and Pacific oceans, is inaugurated with the passage of the U.S. vessel Ancon, a cargo and passenger ship.

On August 15, 1914, the government of Japan sends an ultimatum to Germany, demanding the removal of all German ships from Japanese and Chinese waters and the surrender of control of Tsingtao—the location of Germany’s largest overseas naval bases, located on China’s Shantung Peninsula—to Japan by noon on August 23.

On August 23, 1914, in their first confrontation on European soil since the Battle of Waterloo in 1815, four divisions of the British Expeditionary Force (BEF), commanded by Sir John French, struggle with the German 1st Army over the 60-foot-wide Mons Canal in Belgium, near the French frontier.

On August 24, 1914, the American poet Alan Seeger volunteers for service in the French Foreign Legion during the First World War.

Over the course of five days, beginning August 25, 1914, German troops stationed in the Belgian village of Louvain during the opening month of World War I burn and loot much of the town, executing hundreds of civilians.

On August 26, 1914, the German 8th Army, under the leadership of Paul von Hindenburg and Erich Ludendorff, strikes with lethal force against the advancing Russian 2nd Army, led by General Aleksandr Samsonov, in East Prussia during the opening weeks of the First World War.

On August 29, 1914, with World War I approaching the end of its first month, the Women’s Defense Relief Corps is formed in Britain.

On September 3, 1914, barely a month after the outbreak of World War I, Giacomo della Chiesa is elected to the papacy of the Roman Catholic Church, becoming Pope Benedict XV.

On the evening of September 4, 1914, General Joseph Joffre, commander in chief of the French army during World War I, gives the order and readies his troops for a renewed offensive against the advancing Germans at the Marne River in northeastern France, set to begin the following morning.

On September 6, 1914, some 30 miles northeast of Paris, the French 6th Army under the command of General Michel-Joseph Manoury attacks the right flank of the German 1st Army, beginning the decisive First Battle of the Marne at the end of the first month of World War I.

In the wake of the Battle of the Marne—during which Allied troops halted the steady German push through Belgium and France that had proceeded over the first month of World War I—a conflict both sides had expected to be short and decisive turns longer and bloodier, as Allied and German forces begin digging the first trenches on the Western Front on September 15, 1914.

In the North Sea, the German U-9 submarine sinks three British cruisers, the Aboukir, the Hogue and the Cressy, in just over one hour. The one-sided battle, during which 1,400 British sailors lost their lives, alerted the British to the deadly effectiveness of the submarine, which had been generally unrecognized up to that time.

On October 19, 1914, near the Belgian city of Ypres, Allied and German forces begin the first of what would be three battles to control the city and its advantageous positions on the north coast of Belgium during the First World War.

While World War I rages in Europe, the first issue of a new magazine, The New Republic, is published in the United States.

On November 14, 1914, in Constantinople, capital of the Ottoman Empire, the religious leader Sheikh-ul-Islam declares an Islamic holy war on behalf of the Ottoman government, urging his Muslim followers to take up arms against Britain, France, Russia, Serbia and Montenegro in World War I.

On November 28, 1914, the New York Stock Exchange (NYSE) reopens for bond trading after nearly four months, the longest stoppage in the exchange’s history.

A month after German naval forces led by Admiral Maximilian von Spee inflicted the Royal Navy’s first defeat in a century by sinking two British cruisers with all hands off the southern coast of Chile, Spee’s squadron attempts to raid the Falkland Islands, located in the southern Atlantic Ocean, only to be thwarted by the British navy. Under the command of Admiral Doveton Sturdee, the British seamen sought vengeance on behalf of their defeated fellows.

At approximately 8 o’clock in the morning on December 16, 1914, German battle cruisers from Franz von Hipper’s Scouting Squadron catch the British navy by surprise as they begin heavy bombardment of Hartlepool and Scarborough, English port cities on the North Sea.

Just after midnight on Christmas morning, the majority of German troops engaged in World War I cease firing their guns and artillery and commence to sing Christmas carols. At certain points along the eastern and western fronts, the soldiers of Russia, France, and Britain even heard brass bands joining the Germans in their joyous singing.