On the morning of January 28, 1917, a Mexican maid named Carmelita Torres refuses to put up with the indignity she has been made to suffer every morning since she started working across the border in the United States. Torres’ objection to the noxious chemical delousing visited upon Mexicans upon crossing the Northern border sparked what became known as the Bath Riots, an oft-overlooked moment in Chicano history.

On January 31, 1917, Germany announces the renewal of unrestricted submarine warfare in the Atlantic as German torpedo-armed submarines prepare to attack any and all ships, including civilian passenger carriers, said to be sighted in war-zone waters.

On February 1, 1917, the lethal threat of the German U-boat submarine raises its head again, as Germany returns to the policy of unrestricted submarine warfare it had previously suspended in response to pressure from the United States and other neutral countries.

American forces are recalled from Mexico after nearly 11 months of fruitless searching for Mexican revolutionary Pancho Villa, who was accused of leading a bloody raid against Columbus, New Mexico.

After seven years of revolution and civil upheaval, Mexican President Venustiano Carranza proclaims the modern Mexican constitution, which promises the restoration of lands to native peoples, the separation of church and state, and dramatic economic and educational reforms. The progressive political document, approved by an elected constitutional convention, combined revolutionary demands for land reform with advanced social theory.

With more than a two-thirds majority, Congress overrides President Woodrow Wilson’s veto of the previous week and passes the Immigration Act of 1917. The law required a literacy test for immigrants and barred Asiatic laborers, except for those from countries with special treaties or agreements with the United States, such as the Philippines.

Just three days after U.S. President Woodrow Wilson’s speech of February 3, 1917—in which he broke diplomatic relations with Germany and warned that war would follow if American interests at sea were again assaulted—a German submarine torpedoes and sinks the Scottish Anchor Line passenger steamer SS California off the Irish coast.

The Austrian submarine U-35 bombs and sinks the American schooner Lyman M. Law in the Mediterranean Sea off the coast of Cagliari, Sardinia. The Lyman M. Law, captained by S.W. McDonough, had embarked on its final journey from Stockton, Maine, with a crew of 10 on January 6, 1917, carrying a cargo of 60,000 bundles of lemon-box staves.

On February 22, 1917, Sergeant Benito Mussolini is wounded by the accidental explosion of a mortar bomb on the Isonzo section of the Italian Front in World War I.

During World War I, British authorities give Walter H. Page, the U.S. ambassador to Britain, a copy of the “Zimmermann Telegram,” a coded message from Arthur Zimmermann, the German foreign secretary, to Count Johann von Bernstorff, the German ambassador to Mexico. In the telegram, intercepted and deciphered by British intelligence in late January, Zimmermann stated that in the event of war with the United States, Mexico should be asked to enter the conflict as a German ally. In return, Germany promised to restore to Mexico the lost territories of Texas, New Mexico and Arizona.

In a crucial step toward U.S. entry into World War I, President Woodrow Wilson learns of the so-called Zimmermann Telegram, a message from German Foreign Secretary Arthur Zimmermann to the German ambassador to Mexico proposing a Mexican-German alliance in the event of a war between the U.S. and Germany.

On March 1, 1917, the text of the so-called Zimmermann Telegram—a message from the German foreign secretary, Arthur Zimmermann, to the German ambassador to Mexico proposing a Mexican-German alliance in the case of war between the United States and Germany—is published on the front pages of newspapers across America.

Barely a month before the United States enters World War I, President Woodrow Wilson signs the Jones-Shafroth Act, granting U.S. citizenship to the inhabitants of Puerto Rico.

Prime Minister Hjalmar Hammarskjöld of Sweden, father of the famous future United Nations Secretary General Dag Hammarskjöld, resigns on this day in 1917 after his policy of strict neutrality in World War I—including continued trading with Germany, in violation of the Allied blockade—leads to widespread hunger and political instability in Sweden.

In Russia, the February Revolution (known as such because of Russia’s use of the Julian calendar) begins on March 8, 1917 when riots and strikes over the scarcity of food erupt in Petrograd. One week later, centuries of czarist rule in Russia ended with the abdication of Nicholas II, and Russia took a dramatic step closer toward communist revolution.

Less than two weeks after their victorious recapture of the strategically placed city of Kut-al-Amara on the Tigris River in Mesopotamia, British troops under the regional command of Sir Frederick Stanley Maude bear down on Baghdad, causing their Turkish opponents to begin a full-scale evacuation of the city on the evening of March 10, 1917.

During the February Revolution, Czar Nicholas II, ruler of Russia since 1894, is forced to abdicate the throne by the Petrograd insurgents, and a provincial government is installed in his place.

Jeannette Pickering Rankin, the first woman ever elected to Congress, takes her seat in the U.S. Capitol as a representative from Montana.

On April 2, 1917, President Woodrow Wilson asks Congress to send U.S. troops into battle against Germany in World War I. In his address to Congress that day, Wilson lamented it is a fearful thing to lead this great peaceful people into war. Four days later, Congress obliged and declared war on Germany.

April 6, 1917: Two days after the U.S. Senate voted 82 to 6 to declare war against Germany, the U.S. House of Representatives endorses the declaration by a vote of 373 to 50. As a result, America formally enters World War I.

After three days of fierce combat and over 10,000 casualties suffered, the Canadian Corps seizes the previously German-held Vimy Ridge in northern France on April 12, 1917.

On April 16, 1917, Vladimir Lenin, leader of the revolutionary Bolshevik Party, returns to Petrograd after a decade of exile to take the reins of the Russian Revolution.

As the major Allied offensive masterminded by Robert Nivelle was failing miserably on the Western Front, British forces in Palestine make their second attempt to capture the city of Gaza from the Ottoman army on April 17, 1917.

On April 25, 1917, jazz legend Ella Fitzgerald is born in Newport News, Virginia.

On April 30, 1917, the so-called Battle of the Boot marks the end of the British army’s Samarrah Offensive, launched the previous month by Anglo-Indian forces under the regional commander in chief, Sir Frederick Stanley Maude, against the important Turkish railroad at Samarra, some 130 kilometers north of Baghdad, in Mesopotamia (modern-day Iraq).

Some six weeks after the United States formally entered the First World War, the U.S Congress passes the Selective Service Act on May 18, 1917, giving the U.S. president the power to draft soldiers.

On May 24, 1917, driven by the spectacular success of the German U-boat submarines and their attacks on Allied and neutral ships at sea, the British Royal Navy introduces a newly created convoy system, whereby all merchant ships crossing the Atlantic Ocean would travel in groups under the protection of the British navy.

One of America’s best-loved presidents, John Fitzgerald Kennedy, is born into a politically and socially prominent family in Brookline, Massachusetts, on May 29, 1917. He was the first American president to be born and then serve in the 20th century.

On June 14, 1917, as the soldiers of the American Expeditionary Force (AEF) travel to join the Allies on the battlefields of World War I in France, United States President Woodrow Wilson addresses the nation’s public on the annual celebration of Flag Day.

On June 15, 1917, some two months after America’s formal entrance into World War I against Germany, the United States Congress passes the Espionage Act.

During World War I, the first 14,000 U.S. infantry troops land in France at the port of Saint-Nazaire. The landing site had been kept secret because of the menace of German submarines, but by the time the Americans had lined up to take their first salute on French soil, an enthusiastic crowd had gathered to welcome them. However, the “Doughboys,” as the British referred to the green American troops, were untrained, ill-equipped, and far from ready for the difficulties of fighting along the Western Front.

On June 29, 1917, several weeks after King Constantine I abdicates his throne in Athens under pressure from the Allies, Greece announces that it is cutting all diplomatic ties to the Central Powers (Germany, Austria-Hungary, Bulgaria, and Turkey). This ends three years of neutrality in World War I and signals Greece's de facto entry into the conflict alongside the Allied nations of Britain, France, Russia and Italy.

On July 7, 1917, British Army Council Instruction Number 1069 formally establishes the British Women’s Auxiliary Army Corps (WAAC), authorizing female volunteers to serve alongside their male counterparts in France during World War I.

On July 17, 1917, during the third year of World War I, Britain’s King George V orders the British royal family to dispense with the use of German titles and surnames, changing the surname of his own family, the decidedly Germanic Saxe-Coburg-Gotha, to Windsor.

In Paris, France, on July 25, 1917, the exotic dancer and suspected secret agent Mata Hari is sentenced to death by a French court for purportedly spying on Germany’s behalf during World War I.

On July 31, 1917, the Allies launch a renewed assault on German lines in the Flanders region of Belgium, in the much-contested region near Ypres, during World War I. The attack begins more than three months of brutal fighting, known as the Third Battle of Ypres.

On August 2, 1917, with British forces settling into new positions captured from the Germans in the much-contested Ypres Salient on the Western Front of World War I, Germany faces more trouble closer to home, as a mutiny breaks out aboard the German battleship Prinzregent Luitpold, anchored at the North Sea port of Wilhelmshaven.

On August 14, 1917, as World War I enters its fourth year, China abandons its neutrality and declares war on Germany.

On August 28, 1917, President Woodrow Wilson is picketed by suffragists in front of the White House, who demand that he support an amendment to the Constitution that would guarantee women the right to vote.

On September 1, 1917, American soldier Stull Holt writes a letter home recounting some of his battlefield experiences on the Western Front at Verdun, France.

On October 3, 1917, six months after the United States declared war on Germany and began its participation in the First World War, the U.S. Congress passes the War Revenue Act, increasing income taxes to unprecedented levels in order to raise more money for the war effort.

Dancer, courtesan and alleged spy Mata Hari is executed for espionage by a French firing squad at Vincennes outside of Paris.

On October 24, 1917, the Battle of Caporetto (also known as the Twelfth Battle of the Isonzo, or the Battle of Karfreit) begins. A combined German and Austro-Hungarian force scored one of the most crushing victories of World War I, decimating the Italian line along the northern stretch of the Isonzo River.

On October 26, 1917, Brazil declares its decision to enter the First World War on the side of the Allied powers.

On November 2, 1917, Foreign Secretary Arthur James Balfour writes an important letter to Britain’s most illustrious Jewish citizen, Baron Lionel Walter Rothschild, expressing the British government’s support for a Jewish homeland in Palestine. The letter would eventually become known as the Balfour Declaration.

After more than three months of bloody combat, the Third Battle of Ypres effectively comes to an end on November 6, 1917, with a hard-won victory by British troops at the Belgian village of Passchendaele.

Led by Bolshevik Party leader Vladimir Lenin, leftist revolutionaries launch a nearly bloodless coup d’état against Russia’s ineffectual Provisional Government. The Bolsheviks and their allies occupied government buildings and other strategic locations in the Russian capital of Petrograd (now St. Petersburg) and within two days had formed a new government with Lenin as its head. Bolshevik Russia, later renamed the Union of Soviet Socialist Republics (USSR), was the world’s first Marxist state.

On November 15, 1917, with his country embroiled in a bitter international conflict that would eventually take the lives of over 1 million of its young men, 76-year-old Georges Clemenceau is named prime minister of France for the second time.

At dawn on the morning of November 20, 1917, six infantry and two cavalry divisions of the British Expeditionary Force—with additional support from 14 squadrons of the Royal Flying Corps—join the British Tank Corps in a surprise attack on the German lines near Cambrai, France.

Well-known psychiatrist W.H. Rivers presents his report The Repression of War Experience, based on his work at the Craiglockhart War Hospital for Neurasthenic Officers, to the Royal School of Medicine, on this day in 1917. Craiglockhart, near Edinburgh, was one of the most famous hospitals used to treat soldiers who suffered from psychological traumas as a result of their service on the battlefield.

At 9:05 a.m., in the harbor of Halifax in the Canadian province of Nova Scotia, the most devastating manmade explosion in the pre-atomic age occurs when the Mont Blanc, a French munitions ship, explodes 20 minutes after colliding with another vessel. More than 1,800 people died.

On the morning of December 9, 1917, after Turkish troops move out of the region after only a single day s fighting, officials of the Holy City of Jerusalem offer the keys to the city to encroaching British troops.

After three years of war, during which there had been no Nobel Peace Prize awarded, the Norwegian Nobel Committee awards the 1917 prize to the International Committee of the Red Cross.

A day after Bolsheviks seize control of Russian military headquarters at Mogilev, a formal ceasefire is proclaimed throughout the battle zone between Russia and the Central Powers.

On December 19, 1917, Montreal teams win the first two NHL games played. In a 7-4 win over the Ottawa Senators, the Canadiens' Joe Malone scores five goals. In his team's 10-9 win over the Toronto Arenas, the Montreal Wanderers' Harry Hyland also scores five goals.

A week after the armistice was signed between Russia and Germany and nearly three weeks after a ceasefire was declared on the Eastern Front, representatives of the two countries begin peace negotiations at Brest-Litovsk, near the Polish border in what is now the city of Brest, in Belarus.

Eight months after the United States enters World War I on behalf of the Allies, President Woodrow Wilson announces the nationalization of a large majority of the country’s railroads under the Federal Possession and Control Act.