 Between April 25 and April 29, Polish aircraft discovered a threat from Army Detachment Steiner.The most intensive day of combat between the Polish aviation 1st Army and Steiner's group was April 26.On this day the 2nd Division and 3rd Regiment made 412 combat flights attacking German troops near Löwensberg, Zehdenick, Bercksdorf and Nassenheide in support of units on the bridgehead over the Ruppiner Canal, while the fighters of the 3rd Division and the 1st Regiment made 128 combat flights on that day, fighting against the Luftwaffe that tried to help Steiner's Group.