This Day in History — American History
March 12, 1917 — U-Boat Sinks the Algonquin as Wilson Orders Armed Merchant Ships
American History Political Leaders USA President WWI
On March 12, 1917, a German U-boat sank the unarmed American merchant ship Algonquin the same day President Woodrow Wilson ordered U.S. merchant vessels to be armed. The events reflected escalating tensions with Germany and marked a turning point as the United States moved closer to entering World War I.
March 11, 1955 — Alexander Fleming Dies at 73
American History Science Scientific Discovery
On March 11, 1955, Alexander Fleming, the Scottish bacteriologist who discovered penicillin, died at age 73. His accidental 1928 discovery launched the antibiotic era, transforming medicine and saving millions of lives. Fleming’s work revolutionized the treatment of infectious disease and remains one of the most important breakthroughs in medical history.
March 10, 1849 — Abraham Lincoln Applies for a Patent
American History Inventors USA President
On March 10, 1849, Abraham Lincoln applied for a patent for a device designed to lift boats over shallow river obstructions. Inspired by his own experiences on Midwestern waterways, Lincoln’s invention aimed to improve navigation. He remains the only U.S. president to ever hold a patent.
March 10, 1945 — Patton’s Third Army Links with Hodges’ First Army
American History Military Leaders WWII
On March 10, 1945, General George S. Patton’s Third Army linked with General Courtney Hodges’ First Army during the Allied advance into Germany. The connection strengthened American front lines, improved coordination, and tightened pressure on German forces as Allied armies pushed toward the final defeat of Nazi Germany in World War II.
March 9th, 1864 — Ulysses S. Grant Named Commanding General
American History Civil War Military Leaders USA President
On March 9th, 1864, President Abraham Lincoln appointed Ulysses S. Grant as Commanding General of the U.S. Army, placing him in charge of all Union forces during the Civil War. His aggressive strategy and coordinated campaigns across multiple fronts would ultimately weaken the Confederacy and help lead the Union to victory.