https://www.defense.gov/Explore/Features/story/Article/1713087/4-major-military-events-that-happened-on-christmas/
4 Major Military Events That Happened on Christmas
DEC. 17, 2018 | BY KATIE LANGE
1776: Washington's Famous Crossing of the Delaware
The mission, which became known as the Battle of Trenton, was of huge significance to the Continental Army's cause. Not only did it raise the troops' spirits, but it revived the hope of the colonists, who were beginning to think their battle for independence wasn't feasible.
1864: The First Battle of Fort Fisher
For most of the Civil War, North Carolina's Fort Fisher saw very little combat. But that changed on Christmas 1864, when the Union decided it wanted to capture the last port the Confederates held on the Atlantic Ocean.
It was a debacle for the Union.
First, the Union tried to pack a warship with explosives and blow up the fort's walls — but that didn't work. It just blew up their ship and alerted the Confederates of an imminent attack. So on Christmas Eve, the Union tried again, bombarding the fort with heavy gunfire, most of which fell short or missed its target.
On Christmas morning, Union commanders decided to shell an area north of the fort so troops could land and come ashore. But when they did, more disappointment followed — the fort's heavy artillery was completely unscathed, so that was a no-go, too. It was only then that the Union ordered troops to retreat.
While the first Battle of Fort Fisher was a massive failure for the Union, the second wasn't. In mid-January 1865, Union troops were finally able to capture the fort, effectively cutting the Confederates off from global trade and supplies. The Civil War ended three months later.
1972: Operation Linebacker II in North Vietnam
American troops were in the middle of the biggest bombing mission in military history during the Christmas season of 1972. The air campaign, called Operation Linebacker II, has largely been considered the action that ended U.S. involvement in the Vietnam War.
President Richard Nixon ordered the bombings to begin on Dec. 18 after North Vietnamese delegates walked out on peace talks. Nicknamed the "11 Days of Christmas," the operation consisted of 11 successive days of raids by B-52 Stratofortress bombers flown in from Andersen Air Force Base in Guam.
The only day that both sides got a reprieve was Christmas, when troops were given a 36-hour break to celebrate. During that time, Nixon ordered the North Vietnamese to return to the bargaining table. The North Vietnamese refused, so the bombings continued until Dec. 29, when they agreed to resume peace talks.
1896: "Stars and Stripes Forever" is Written
While this wasn't exactly a military action, it's definitely a symbol of America's military might.
John Philip Sousa, who grew up during the Civil War, was a talented musician who became a long-time director of the U.S. Marine Band. Known as the "March King," he was a rock star of his time, eventually starting his own band in 1892.
On Christmas Day 1896, while crossing the Atlantic on his way home from a European vacation, Sousa's lasting legacy came to him. He said the notes for "Stars and Stripes Forever" were born out of homesickness and fond memories of his time as the Marine Band's leader.
The iconic song officially became America's national march in 1987.