|Serial 316101, ship 20, in the lead, is a C-47A.|
The back of the photo on the left is marked "Photographic Section, Sedalia Army Air Field, Warrensburg Missouri" (the back of the second print isn't marked at all). Sedalia was established in November 1942 as a training base for WACO glider pilots, so these two C-47s likely were primarily used as glider tow planes. During the early months of 1945, the base's C-47s were replaced by Curtiss C-46 Commandos, so that plus the tail numbers of these planes place the date the photos were shot somewhere between late 1943 and early 1945.
|Ship 26 is either serial 316140 or 316149, the image just isn't clear enough to be|
certain, either way, it is a C-47B.