The first American balloon group arrived in France on December 28, 1917. It separated into four companies that were assigned individually to training centers and instructed in French balloon procedures, then equipped with Caquot balloons, winches, and parachutes. The 2d Balloon Company joined the French 91st Balloon Company at the front near Royaumeix on February 26, 1918. On March 5 it took over the line and began operations supporting the U.S. 1st Division, becoming the "first complete American Air Service unit in history to operate against an enemy on foreign soil."