Having suspended attacks in 1916 to avoid U.S. entry into the war, German officials decide to re-engage in unrestricted submarine warfare against all ships.

After raids and increased public anger on both sides of the border, President Wilson and President Carranza convene a Joint High Commission in Connecticut to improve diplomatic relations between the...

Francisco "Pancho" Villa, a revolutionary formally backed by the U.S. government, and an army of guerrillas raids and razes the town of Columbus, New Mexico, leaving 19 Americans dead.

The German SMS Magdeburg, which fired the war’s first shots in the East, runs aground. Russians retrieve three German naval codebooks from the cruiser. One is given to British Intelligence, known as...

A British cable ship cut Germany’s communication lines, five trans-Atlantic cables, and the six communication cables connecting Great Britain and Germany.

In Madison Square Garden a charity bazaar for the widows and orphans of German, Austrian, Hungarian and their allies' soldiers was held. One organizer responded to criticism, “while we are pro-German...

“Ambulance after ambulance came from the lines full of clients: kindly hands pulled out the stretchers, and bore them to the wash-room. The uniforms were slit from mangled limbs. The wounded lay naked...

He returned on Dec. 24. “I didn’t get much peace but I heard in Norway that Russia might well become a huge market for tractors soon.”...

Congress passes the National Defense Act of 1916. It doubles the size of the Regular Army, increases the National Guard to 475,000, and gives the President authorization to mobilize the Guard in cases...