William J. Ross was a Human male who served as a officer in the First War. As an admiral, Ross took command of military operations during Operation Downfall and one of the many leaders that led the Allied forces during the Battle of Valia,.

Ross was the head of forces during Operation Downfall and coordinated his battle plans from Yavin 4. When Commander Bly arrived at Yavin 4, Ross appointed him the lead in a mission to destroy a Dominion ketracel-white facility using the Jem'Hadar attack ship they had captured a year prior. Later that year, he was present for and supported Operation Downfall, Alliance's plan to take Valia and thus put an end to the brutal First War.

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