Complex sentence: He was appointed a cadet in the U.S. Military Academy June 15,1905 and graduated June 11,1909, with the degree of bachelor of science and commissioned a second lieutenant, Cavalry.
Split into simpler sentences: He was appointed a cadet in the U.S. Military Academy on June 15,1905. He and graduated on June 11,1909, with the degree of bachelor of science and commissioned a second lieutenant, Cavalry.