WARS & HISTORICAL ERAS

During the Vietnam War, American units operated in a confusing environment where enemy fighters, civilians, and local political forces often mingled in the same villages and rice fields. On March 16th, 1968, a United States Army company entered the My Lai area in South Vietnam expecting to find a strong enemy presence.

In the winter of the American Revolution, diplomats in Paris secured an agreement that transformed the struggle for independence. On February 6th, 1778, the United States and France signed a formal Treaty of Alliance and a companion treaty of commerce, bringing a major European naval and military power openly into the war against Britain.

On December 24th, 1814, American and British negotiators agreed to the Treaty of Ghent, formally ending the War of 1812 even as fighting continued thousands of miles away.

On February 2nd, 1848, American and Mexican negotiators agreed to the Treaty of Guadalupe Hidalgo, ending the Mexican-American War. United States armies had marched from the Rio Grande to Mexico City, occupying the enemy capital and forcing the issue of a final settlement. The treaty recognized the Rio Grande as the boundary of Texas and transferred a vast region of northern Mexico into United States hands, including present-day California, Nevada, Utah, and large parts of Arizona and New…

After years of war and months of negotiation, delegates of the Confederation Congress gathered in Annapolis to ratify the peace treaty that had been signed in Paris the previous year. By approving the agreement on January 14th, 1784, the United States formally ended the Revolutionary War in the eyes of European powers and secured recognition of its independence and new borders.

Two years after Yorktown, diplomats concluded the conflict on paper in a treaty signed in Paris.

A year to the day after gunfire at Monmouth, but in a different century and on another continent, representatives of the victorious Allied powers assembled in the Hall of Mirrors at Versailles to sign the treaty that formally ended World War I. For American troops, many of whom were already heading home, the signing marked the legal close of a conflict that had drawn the United States out of its traditional distance from European wars and into coalition warfare on a massive scale.

Only one day after the Port Royal victory, another Union action at sea nearly widened the war in a dangerous direction.

In a remote stretch of New Mexico desert, the United States Army’s Manhattan Engineer District prepared to test a weapon unlike any used before. In the early hours of July 16th, 1945, scientists and soldiers watched as the “Gadget,” an experimental plutonium device, detonated atop a tower at the Trinity site. The explosion produced an intense flash, a rising fireball, and a towering mushroom cloud that confirmed the destructive potential of nuclear fission weapons.

On January 31st, 1950, President Harry Truman announced that the United States would move ahead with development of a thermonuclear or hydrogen bomb. The decision followed the Soviet Union’s first atomic test and intense debate among scientists, soldiers, and policymakers about the future of nuclear weapons. A hydrogen bomb promised yields far beyond earlier fission devices, raising questions about strategy, morality, and the very possibility of controlled war.

Two days after the invasion began, President Harry Truman announced that he had ordered American air and naval forces to support South Korea and directed the Seventh Fleet to the waters near Taiwan. The decision, made without a formal congressional declaration of war, marked one of the earliest and most consequential uses of presidential authority to commit U.S. forces in the emerging Cold War.

Five days after North Korean forces crossed the 38th parallel and invaded South Korea, President Harry Truman took a decisive step. On June 30th, 1950, he authorized the deployment of United States ground combat units to support South Korean forces already reeling under the assault. Air and naval power had been committed earlier, but this order meant American soldiers would again fight on the ground in Asia.

More than a year after victory in Europe and the Pacific, President Harry Truman issued a proclamation on December 31st, 1946, formally declaring the end of hostilities in the Second World War for the United States.

During the Korean War, President Harry Truman made a decision that highlighted the core American principle of civilian control over the military. General Douglas MacArthur, widely respected for his leadership in the Pacific during the Second World War and early operations in Korea, had increasingly clashed with Truman and other civilian leaders over war aims and public statements.

Not all significant dates in military history involve combat with a foreign enemy. On April 19th, 1989, a devastating explosion ripped through the Number Two sixteen-inch gun turret aboard the battleship USS Iowa during a gunnery exercise in the Atlantic. The blast killed dozens of sailors inside the turret and surrounding spaces, shocking both the fleet and the public.

On February 10th, 1967, the Twenty-fifth Amendment to the United States Constitution was ratified, quietly reshaping how the nation would manage presidential disability and succession in an era of nuclear weapons and global commitments. The amendment clarified what would happen if a president died, resigned, became incapacitated, or needed to temporarily transfer power, and it formalized the process for filling a vacancy in the vice presidency.

By the summer of the Second World War, Allied forces were fighting their way up the Italian boot while strategic air forces targeted the infrastructure that kept Axis armies supplied. On July 19th, 1943, hundreds of bombers from the United States Army Air Forces and the Royal Air Force attacked rail yards and communications nodes in and around Rome. The strikes aimed to disrupt German logistics and pressure Italy’s leaders at a moment when the regime of Benito Mussolini was already wobbling.

In the wake of the September 11th attacks, defense planners reexamined how the United States organized its military commands to protect the homeland.

During the Second World War, Allied planners launched a raid on the German-held French port of Dieppe to test defenses and gather experience in amphibious operations. Among the mostly Canadian and British troops who went ashore that August morning were several dozen members of the newly formed United States Army Rangers, making their first combat appearance in Europe.

By December 15th, 1862, the Army of the Potomac was pulling back across the Rappahannock River after the bloody defeat at Fredericksburg.

After months of siege warfare around Petersburg, Virginia, General Grant ordered a major assault on the overstretched Confederate lines protecting both Petersburg and the capital at Richmond. Union forces, including troops from several corps that had been steadily probing and extending the siege lines, attacked at multiple points along the defensive works. The Confederate positions, manned by weary soldiers of General Robert E.

During the American Civil War, control of rivers was as important as control of railroads, and Union commanders in the Western Theater understood that geography could be a weapon. On February 6th, 1862, combined Union army and navy forces under Brigadier General Ulysses S. Grant and Flag Officer Andrew Foote attacked Fort Henry on the Tennessee River, a Confederate strongpoint guarding access into the Deep South.

The day after the fighting at Jonesborough, Union troops moved into Atlanta and took control of one of the Confederacy’s most important industrial and railroad hubs.

Two years after the Emancipation Proclamation and months after the main Confederate armies had surrendered, Union military authority was still spreading across the far corners of the former Confederacy. On June 19th, 1865, Major General Gordon Granger landed in Galveston, Texas, at the head of Union troops and read General Order No. 3, announcing that enslaved people in Texas were free under federal law.