A file of signals intelligence reports, messages, and correspondence issued by the Government Code and Cypher School and sent by the head ('C') of the Secret Intelligence Service (MI6) to the Prime Minister, Winston Churchill. This file includes the following reports on North Africa: Army Group Africa reports preparations for an enemy offensive on the Mareth Front, on March 9; Army Group Africa reports enemy reinforcement of the Mareth Front and expect an early offensive, on March 10; on further enemy reinforcement of the Mareth Front, on March 10; that the Germans expect strong Allied pressure towards Sardinia, on March 10; a German Air Force (GAF) at Tunis evening report, for March 11; and that the Germans in Tunisia are dissatisfied with their mark III tanks, on March 11; on Yugoslavia: of cooperation between German troops and Mihailovich forces, on March 3; on the Mediterranean: that limitation is to be placed on the participation of GAF officers in operations in order to reduce losses, on March 11; that Berlin seeks maps of the Greek islands; and of anti-Axis strikes and demonstrations in Greece, on March 4-5; and on the Southern Russian Front: that the GAF is to support an attack on Kharkov, on March 10.