From May 5th, 2026 through May 11th, 2026, the calendar lines up with a remarkable spread of turning points in United States military history. Across these seven days we see early Revolutionary War raids, the opening salvos of expansionist conflict in the nineteenth century, and the brutal attrition of Civil War campaigns in Virginia. The week also carries us into the world wars at sea, through desperate fortress defenses and pioneering carrier battles in the Pacific, and on into the final days before Victory in Europe. In the Cold War era, these same dates frame the first American human spaceflight and some of the most controversial fighting and bombing campaigns of the Vietnam War. Taken together, the events highlighted here show how decisions made in forests, fortresses, carrier decks, hilltops, and even space capsules have shaped the way Americans fight, think about, and remember war. This edition of “This Week in U.S. Military History” traces those threads of leadership, technology, endurance, and public opinion across very different eras.
Capture of Fort Ticonderoga
In the early weeks of the Revolutionary War, a small American force moved quietly across Lake Champlain toward the poorly defended British post at Fort Ticonderoga. Led by Ethan Allen and Benedict Arnold, the raiders surprised the garrison at dawn and demanded its surrender, capturing the fort and its store of artillery with barely a shot fired. Those heavy guns did not simply sit in the stone walls they had just taken. Over the following months, an arduous winter trek moved the cannon east, where they were emplaced on heights overlooking Boston. Their presence helped convince the British that holding the city was no longer tenable, nudging them toward evacuation. This early success gave the young rebellion badly needed confidence and a tangible symbol that colonial militias and emerging Continental forces could outmaneuver imperial garrisons. The story of Ticonderoga shows how daring raids and logistical ingenuity can have strategic consequence far from the initial moment of surprise.
Open the Wiki entryPresident Polk’s war message on Mexico
Decades later, the United States stood on the edge of another conflict as patrols clashed along the disputed border with Mexico. On May 11th, 1846, President James K. Polk addressed Congress and described these incidents as Mexican forces invading American soil and spilling American blood. His message framed the fighting not as a limited frontier skirmish but as a clear act of aggression, urging Congress to recognize that a state of war already existed. Within days, lawmakers answered with a formal declaration, opening the Mexican-American War. For the United States Army, the conflict that followed served as both a testing ground and a classroom, producing a generation of officers who would later command on both sides of the Civil War. The war also reshaped the map of North America, adding territories that would become states from Texas to California. This moment in May reminds us how presidential words to Congress can accelerate local incidents into full-scale campaigns with lasting consequences.
Open the Wiki entryBattle of the Wilderness and the Overland Campaign
Almost twenty years later, the United States tore itself apart in civil war, and May 5th, 1864 marked the beginning of a grim new phase. That day, Lieutenant General Ulysses S. Grant pushed the Army of the Potomac south across the Rapidan River into a tangle of underbrush and second-growth forest known simply as the Wilderness. In that terrain, visibility collapsed, lines broke apart, and musket flashes set the woods on fire, trapping wounded soldiers in flames. The resulting clash with Robert E. Lee’s Army of Northern Virginia produced staggering casualties on both sides. Yet the strategic significance lay in what Grant did after the bloodshed. Instead of retreating north as previous Union commanders had done after hard battles, he continued moving south and east toward Spotsylvania Court House, signaling a relentless campaign he intended to press until the Confederate army could no longer stand. The Wilderness shows how leadership choices after a battle can matter as much as decisions made during the firing.
Open the Wiki entrySinking of the Lusitania
On May 7th, 1915, the British liner Lusitania approached the coast of Ireland, carrying civilians, including many American passengers, through waters patrolled by German submarines. When a German U-boat torpedoed the ship, the blast and a rapid list sent the liner under in a matter of minutes, leaving thousands in the water and claiming well over a thousand lives. Among the dead were American men, women, and children, whose loss resonated far beyond the Atlantic crossing itself. In the United States, news of the sinking sparked outrage and intense debate over neutrality, maritime rights, and the risks of traveling on belligerent ships. Although the country did not declare war for another two years, this attack helped shift public opinion and pressured German leaders to temporarily scale back the most aggressive forms of submarine warfare. For American military history, the Lusitania’s fate marks a moment when global naval strategy, civilian vulnerability, and national policy intersected in a single tragic event.
Open the Wiki entrySurrender of Corregidor in the Philippines
In the early months of the Second World War, American and Filipino defenders fought a desperate holding action in the Philippines as Japanese forces pressed south across the Pacific. While Bataan fell in April, the island fortress of Corregidor in Manila Bay continued to resist under constant bombardment, its tunnels crowded with wounded, staff, and the last reserves of ammunition. By May 6th, 1942, the garrison under General Jonathan Wainwright faced collapse under crushing artillery and infantry assaults. With no realistic hope of relief and to prevent further slaughter, Wainwright agreed to surrender the island. The fall of Corregidor ended organized American resistance on Luzon and cleared the way for complete Japanese control of the archipelago, ushering in years of occupation and suffering for the local population. Yet the defenders’ stubborn stand became part of the narrative behind the vow that American forces would one day return, and their endurance shaped later efforts to honor prisoners of war and those who never came home.
Open the Wiki entryCarrier duel in the Coral Sea
Even as Corregidor fell, the fortunes of the Pacific war were beginning to shift at sea. In early May 1942, American and Japanese carrier groups maneuvered through the Coral Sea, each searching for the other’s position with aircraft rather than surface scouts. On May 8th, following the sinking of the light carrier Shoho the day before, the main carrier duel unfolded. Planes from USS Lexington and USS Yorktown struck the Japanese carriers Shokaku and Zuikaku, damaging one and depleting the air group of the other, while Japanese aircraft inflicted fatal damage on Lexington and hurt Yorktown. Tactical losses were heavy, and Americans mourned the loss of a proud carrier, but strategically the Japanese advance toward Port Moresby was halted. The battle became the first major naval engagement in which opposing fleets never saw one another directly, fighting entirely through their air wings. Coral Sea demonstrated that carrier aviation now sat at the center of naval power, setting the stage for the battles to come.
Open the Wiki entryBattle of Castle Itter in Austria
As the war in Europe neared its end, one of its strangest engagements unfolded at a medieval fortress in the Austrian Tyrol. Castle Itter held prominent French prisoners, including former prime ministers and generals, guarded by German troops who themselves faced collapse as American forces drew near. In early May, a Wehrmacht officer and Austrian resistance members decided to switch sides, seeking help from an American tank crew and bringing a small armored detachment back to the castle. On May 5th, 1945, this unlikely coalition of American soldiers, anti-Nazi Germans, and local fighters defended the fortress against attacks by fanatical SS units determined to retake the prisoners and punish the defectors. The defenders held out under fire until relief reached them from advancing American forces. The episode at Castle Itter is unique in United States military history, illustrating how, in the final days of a collapsing regime, former enemies can become temporary allies to protect human lives and uphold basic decency amid chaos.
Open the Wiki entryVictory in Europe Day
Just three days after Castle Itter, the wider war in Europe officially reached its end for American forces and their allies. An unconditional surrender had been signed by German representatives at Reims on May 7th, but the following day became widely known as Victory in Europe Day, or V-E Day, as the terms took effect and celebrations broke out across liberated cities and Allied capitals. For American service members, the day carried mixed emotions: relief that the brutal fighting in Europe was over, remembrance of fallen comrades, and awareness that the war against Japan still lay ahead. Street scenes from London to New York showed strangers embracing, flags waving, and military uniforms mingling with civilian joy. Yet soldiers in Europe also stood guard, managed prisoners, and began the long tasks of occupation and rebuilding. V-E Day underscores how victory in modern war involves both moments of public celebration and the quiet, continuing responsibilities of those who fought it.
Open the Wiki entryAlan Shepard’s Freedom Seven flight
Two decades later, the focus of competition and security concerns had shifted beyond the atmosphere. On May 5th, 1961, naval aviator Alan Shepard climbed into the cramped Mercury capsule Freedom Seven atop a Redstone rocket in Florida. His suborbital flight lasted only about fifteen minutes, but it made him the first American to travel into space and demonstrated that the United States could send a person safely into and back from this new domain. Shepard’s background as a test pilot and naval officer reflected the close ties between early space efforts and military aviation, as lessons learned in rocketry, guidance systems, and reentry shaped both civilian programs and defense-related technologies. Coming shortly after a Soviet cosmonaut had completed an orbital mission, the success of Freedom Seven boosted morale and helped justify further investment in spaceflight. In long perspective, this brief ride above the atmosphere became one of the stepping stones from wartime rocketry to a world where space is central to communications, navigation, and national security.
Open the Wiki entryHamburger Hill in Vietnam
On May 10th, 1969, paratroopers of the 101st Airborne Division began a series of assaults against a steep, jungle-covered height in the A Shau Valley that would become known as Hamburger Hill. The Vietnamese Army defenders were dug into bunkers and trenches woven into the slopes, forcing American units to climb under fire again and again through mud, foliage, and concealed obstacles. Over ten grueling days, the hill changed hands in bitter close combat, with aircraft, artillery, and infantry all brought to bear at great cost. When the peak was finally taken, the position itself had limited long-term value and was soon abandoned, raising harsh questions at home about the logic of sacrificing so many lives for such ground. News coverage and veteran testimony from the battle intensified criticism of the war’s conduct and helped push American leaders toward shifting strategy and accelerating the process of handing more responsibility to South Vietnamese forces. Hamburger Hill remains a symbol of courage under fire and of the painful debates that accompany protracted conflict.
Open the Wiki entryOperation Linebacker and renewed air campaigns
Three years later, the focus in Vietnam had shifted from large American ground offensives toward air power as the main tool for influencing events. On May 9th, 1972, the United States began a new phase of bombing known as Operation Linebacker, paired with the mining of North Vietnam’s principal harbors to cut the flow of supplies. Navy aircraft from carriers offshore and Air Force crews flying from more distant bases struck transportation networks, supply depots, and air defenses, while sea mines made it far more dangerous for ships to enter or leave port. The campaign responded to a major North Vietnamese offensive and aimed to give South Vietnamese units breathing room while pressuring Hanoi to negotiate. For American airmen, Linebacker showcased evolving technologies such as precision-guided munitions and highlighted the risks of flying against increasingly dense air defenses. In the broader arc of United States military history, it marked both the reach of modern air power and the limits of what bombing alone can achieve in a complex, politically charged war.
Open the Wiki entryAcross the Week
In one week on the calendar, these events trace a path from a lakeside fortress in the age of muskets to forests aflame in Virginia, from dark North Atlantic waters to island tunnels and carrier flight decks in the Pacific, and onward to space capsules, jungle hillsides, and jet aircraft over heavily defended targets. Each episode involved ordinary Americans placed in extraordinary circumstances, whether hauling cannon over frozen roads, enduring bombardment in underground galleries, or flying through walls of anti-aircraft fire. The decisions made in these moments shaped not only specific campaigns but also public opinion, technological development, and the way the United States understands the costs and purposes of military force. As readers and listeners consider the anniversaries from May 5th, 2026 through May 11th, 2026, this week offers a chance to connect past service and sacrifice with the uniforms, ships, aircraft, and families who still carry the weight of defense today.