(c) Crown copyright images reproduced by courtesy of The National Archives, London, UK
Catalog numbers WO208/3556 #51, #52, #53
This post includes Columba Summery #12 for the first 6 months of 1944.
Points in the summary:
Returns were low but considered critical during the pre-invasion period;
4424 pigeons were dropped by parachute;
Operation Columba provided the first intimation of “order of battle” news considered important to SHAEF regarding German troop movements;
5 reports gave the first news of military underground works;
Names of collaborators were sent to SHAEF, per their request;
After the invasion began the Germans offered big rewards for the capture of Allied pigeons;
In Denmark, pigeon owners were given the choice of killing their pigeons or turning them over to the Wehrmacht.