Aloysius A. Geis was born in 1921 in Franklin County, Indiana. He was the son of Urban Adam Geis and Genevieve E. Stier Geis.

Aloysius served in the 873rd Bomber Squadron, 498th Bomber Group, as a Second Lieutenant and Flight Engineer on the B-29 #44-61666 'Sweet Sixteen' during World War II.

On September 4, 1945, the crew was dropping relief supplies to the POW camp in Kawaminami Kogyo Koyagijima Shipyard in Koyagi Village, Nishisonogi District, Nagasaki Prefecture (now Koyagi Town, Nagasaki City ). However, due to an unknown circumstance, they crashed into Mount Sashiki on the opposite shore of Koyagi Island, killing thirteen members of the crew (including 2Lt Geis). Only one survived. The bodies of those who were killed were cremated in the pow camp by the prisoners of war and enshrined in the Oura Catholic Church. 2Lt Geis has a cenotaph in the Manila American Cemetery, Taguig, Metro Manila, Philippines.