 The original plan for the Soo Line Railroad (completed in 1905) branch line that passes through Warren called for it to run from Thief River Falls to Argyle and then west.Argyle interests hoped the establishment of a railroad junction there would lead to the removal of the county seat from Warren to Argyle.Other interests prevailed, although the railroad line forms a parabola extending north from Thief River Falls, and then south to Warren, as if the plan changed while the line was being built.