In August 1914, Richthofen became a cavalry officer in World War I. In May 1915, he joined the air service and became an observer. He did that because the training course was shorter and would get him to fighting faster. In October, he began training as a pilot. In March 1916, he entered combat. He had his first victory in April. In 1917, he was in command of a squadron nicknamed the "flying circus". He painted his airplane red so his fellow Germans could see him. Richthofen’s sixteenth victory flying a plane made him the best pilot in Germany in 1917.