Garage combo the Trenchmen formed in Minot, ND, in 1965, originally comprising singer/bassist Jim Mackey, guitarist Greg Jordahl, organist Alan Mattson, and drummer Ken White. Forming at the zenith of Beatlemania, the group also copped a strong sonic influence from the Ventures, honing their sound at area proms and teen dances -- by year's end, they were enough of a local attraction to catch the attention of booking agent Vern Garrison and his Mid-American Production company. With M.A.P. at the helm, the Trenchmen spent virtually every weekend of 1966 gigging across the Dakotas, expanding their travels to include Montana and Manitoba by the following year. In mid-1967 they traveled to Minneapolis' Kaybank Studios to record a pair of Jordahl originals, "Chains on My Heart" and "Travel With Me," issued on the Trenchmen's own Sound Impact label. Soon after, White resigned and was replaced by drummer Todd Ballantyne. In early 1968, Mackey enlisted in the U.S. Navy -- plans to find a replacement were soon shelved, however, and the Trenchmen dissolved. The German label Break-a-Way later reissued both sides of the "Chains on My Heart" single as part of a 10" also featuring fellow North Dakota garage band the Lost Souls.