In 2123, Granger commanded the Earth ship SS Mariposa on a colonization mission to the Ficus sector, with a mixed group of colonists ranging from Irish Neo-Transcendentalists to technology-savvy scientists.
Following the departure of the Neo-Transcendentalists on Bringloid V, the Mariposa crash-landed on a class M planet in a neighboring system, one-half light year from the Bringloid system. Only five individuals survived the crash, including Granger. After founding the Mariposa colony, he and his fellow survivors resorted to cloning to survive. In 2365, one of his clones, Wilson Granger, was the colony's Prime Minister while another, Victor Granger, was the Minister of Health. (TNG: "Up The Long Ladder")