In this May the 28th 1945 photo members of the 2nd Armoured Division play cards while awaiting shipment home.
They are identified by the unit badge on the left shoulder
Badge: a triangle divided into three equal parts blue (infantry), yellow (cavalry) and red (artillery) with, stitching on the whole, in black, of the caterpillars and a gun crossed by a flash red with the division number (2) over it. Under the triangle, the nickname " Hell on wheels"
http://en.wikipedia.org/wiki/2nd_Armored_Division_(United_States)