Von Steuben Day is a holiday traditionally held on a weekend in mid-September (von Steuben was born September 17), celebrating the Prussian-bornBaron Friedrich von Steuben, who arrived in the United States as a volunteer offering his services to General George Washington in the American Revolutionary War. Von Steuben is still regarded as one of the most important German Americans, as his training of the young American troops made victory against the British possible. Thus, his work helped gain independence for the United States of America. The day is generally considered the German-American event of the year, and many participants wear tracht costumes, including dirndls and lederhosen, to celebrate their heritage. Celebrations focus on parades where participants march, dance, and play music.