Four days later, the 3132nd tore up to the Moselle River east of Luxembourg for a one-night stand involving sonic alone. This operation was called FLAXWEILER (17-18 January). It was designed to assist the XII Corps Diekirch attack by supporting a river crossing demonstration 19 miles to the south. This diversion was operated by the 2nd Cavalry Group. The Cavalry stepped up reconnaissance; displayed bridging material and boas, threw over some artillery concentrations and smoke; moved some tanks up and crossed the river with combat patrols. Te 3132nd augmented the deception with a heavy sound play. From 0025 to 0500 on a little road 1500 yards from the river, the sonic vehicles raced up and down broadcasting the arrival of tank forces, A decided increase in enemy artillery fire was received in this section on the following morning but the 3132nd had slipped back to Briey before daylight.