Complex sentence: In 1939 Schoonmaker joined a new division of the U.S. Army known as the Office of Strategic Services or O.S.S, where he was stationed in Spain, After the war, Alexis Lichine negotiated a full partnership with Schoonmaker, but the wine partnership ended bitterly.
Split into simpler sentences: In 1939 Schoonmaker joined a new division of the U.S. Army known as the Office of Strategic Services or O.S.S, where he was stationed in Spain. He received the Bronze Star for his work with the O.S.S. After the war, Alexis Lichine negotiated a full partnership with Schoonmaker, but the wine partnership ended bitterly.