May 22 in U.S. military history

1804: The “Corps of Discovery,” a group of about four dozen Army volunteers led by Capt. Meriwether Lewis and 2nd Lt. William Clark, departs St. Charles Missouri on the Lewis and Clark Expedition. Altogether, the company will travel some 8,000 miles as they map and explore the recently acquired Louisiana Purchase and find a route to the Pacific Ocean for President Thomas Jefferson.

1912: The aviation arm of the U.S. Marine Corps is born with the arrival of 1st Lt. Alfred A. Cunningham at the Naval Aviation Camp, Annapolis, Maryland. There, Cunningham will begin his flight training, and with less than three hours of instruction, he will solo in a Wright Model B-1 biplane.

1945: As the threat of Cold War with the Soviets begins to materialize following the end the war in Europe, the U.S. military begins recruiting and evacuation of valuable German rocket scientists and their families. Some 1,600 scientists, technicians, and engineers begin work for the United States, most notably Wernher von Braun – the father of American rocket technology and space science.

1968: The fast-attack submarine USS Scorpion (SSN-589) is mysteriously lost at sea several hundred miles off the Azores. All hands – 99 sailors – perish. Scorpion is the second American nuclear sub to sink, after USS Thresher (SSN-593) goes down in 1963.