He was part of Commodore Henri Clignet's inner ciricle, and held the rank of "Citizen Lieutenant". After the capture of the Solarian freighter Emerald Dawn and the death of its command crew, Eisenhower was put in charge of the vessel as prize master.
When the Emerald Dawn and her escort were attacked by the Royal Manticoran Navy cruiser HMS Hexapuma in the Nuncio System, Lieutenant Eisenhower ordered his crew to destroy the freighter. However, a fight broke out and the freighter survived long enough for the Manticorans to board her. (SI1)