Battle of Bologna

[7] When the Polish commander of II Corps, General Władysław Anders, asked for his unit to be withdrawn from the front line, Winston Churchill told him "you [the Poles] are no longer needed" but the American and British front line commanders—Generals Richard McCreery, Mark Wayne Clark and Field Marshal Harold Alexander—requested Anders that the Polish units remain in their positions, as they had no troops to replace them.

[7][9] Major-General Zygmunt Bohusz-Szyszko (acting commander) The offensive on Bologna started on 9 April at 4:00 am local time, with a major air and artillery bombardment of 400 guns firing on German positions, followed by an advance of ground forces the same evening.

[2][11] Friendly fire caused casualties as American bombers killed 38 advancing Polish troops on that day.

[2][14] The Polish II Corps, commanded by General Zygmunt Bohusz-Szyszko, suffered 234 dead and 1,228 wounded out of 55,780 front line personnel.

[7][14] German divisions were left in disarray, and as the end of the war neared, many splintered into small groups in order to retreat across the Po and try to reach the passes into Germany.

The 65th Infantry Division lost its commander, Generalmajor Hellmuth Pfeifer in the last days of the war as he tried to make his way north with the remnants of divisional headquarters.

Allied Spring Offensive: Italy 1945, 9 April – 2 May. This map shows the advance of the Polish II Corps on Bologna
Map of US IV and II Corps breakthrough into the Po valley , April 1945 (this map shows operations in the Bologna region, 14–21 April 1945, but does not seem to show any operations of non-US troops in the region)
German Tiger I tank destroyed near the Medicina Canal, April 1945.