 Complete the following phrase:  Lega volunteered for aviation in late 1916. He qualified as a pilot on 1 September 1916, and was granted his license on 1 November 1916. By 30 January 1917, he had finished pilots training, as he was then posted to reconnaissance duty with 21a Squadriglia. He was further rated in Savoia-Pomilio SP.2s on 14 February 1917; he was also promoted to tenente. His duties as a reconnaissance pilot between May and November 1917 earned Lega a Silver Medal for Military Valor. He remained with this squadron until it was withdrawn from service in the wake of the 