Company B continued on assisting rapidly moving armor in the Seventh Army's race to head off German entrenchment in a feared National Redoubt and seal off Alpine passes to Nazi escape.

The 289th served occupation duty in three locations in southwest Germany before beginning its return to the United States via Antwerp, Belgium in August 1945.

As a combat service support unit operating at corps level, the 289th was deployed as needed in whole or part, with companies and platoons often temporarily attached to other field commands.

Immediately following this the 289th moved near Saarbrücken, where it refined its training and acquired combat engineering materials in preparation for joining in Operation Undertone, the Allied invasion of the Saarland set to commence on 15 March.

It then pivoted south through badly ravaged Crailsheim in several short encampments over the next three weeks, facing diminishing German resistance in areas then falling well behind rapidly advancing front lines.

In late April Company B was tasked to support the fast-moving 12th Armored Division[10] in its drive deep into Bavaria to prevent the establishment of a German National Redoubt.

With engineers building bridges as fast as the Wehrmacht and Waffen SS could blow them, the 12th roared toward the finish in the Seventh Army's race to the Alps to seal off the Brenner Pass to Nazi escape;[12] a prize nabbed at the wire by the rival 103rd Infantry Division on 4 May.

[10] Occupation duty included being rushed to secure the Kaufbeuren Air Base in southern Bavaria when it was revealed as the final location of the Nazi Party's top secret FA signals intelligence and cryptanalytic agency.

[14] Perceived crucial by TICOM, the U.S. intelligence and technology gathering organization, its top secret records forced the 289th into the unusual role of military police.