sentences:  Frost resigned his commission in 1853 for domestic reasons and became a partner in a lumber planing mill.He later established D. M. Frost & Co., a prominent fur-trading company from Kansas to the West Coast.Politically active, Frost was elected in 1854 to the Missouri General Assembly as a senator from Benton County and was a strong supporter of "Central Clique" of wealthy planters in Missouri state politics.