The Soviets got really pissed when we allowed the remnants of the Ninth Army to cross the Elbe unopposed and surrender to us. There is archival footage of the Germans inching across a blown bridge while their AA goes after Soviet aircraft trying to bomb them while US troops watch from the other side doing nothing. Eisenhower agreed all troops captured afterwards coming across the US/Soviet demarcation line would be turned over to the Russians.
Operation Keelhaul, not our best moment.