On 12 January 1940, Armstrong Whitworth Whitley bombers of No. 77 Squadron, operating from bases in France, conducted the Royal Air Force’s first leaflet-dropping operation over Prague and Vienna. The mission marked a significant moment in the early months of the Second World War, reflecting the British Government’s cautious approach to offensive air operations during what became known as the “Phoney War.”
By January 1940, Britain and France had been at war with Germany for over four months, yet large-scale bombing of German cities had not commenced. Political and strategic considerations weighed heavily on Allied planning. There was concern that immediate escalation to area bombing might provoke German retaliation against British and French civilian centres. As a result, early RAF operations over enemy territory were limited in scope and largely symbolic.
The Concept of the Leaflet Operation
The leaflet raids, sometimes referred to informally as “Nickel” operations, were designed to disseminate propaganda material over occupied and Axis-controlled territories. The intention was to communicate directly with civilian populations, to undermine confidence in German leadership, and to demonstrate that the Allies retained the capability to reach distant targets.
The 12 January mission targeted Prague and Vienna, both under German control following the occupation of Czechoslovakia in 1939 and the Anschluss with Austria in 1938. By selecting these cities, the RAF aimed to address populations within territories recently absorbed into the expanding Reich.
No. 77 Squadron’s Armstrong Whitworth Whitleys were tasked with the operation. The Whitley, a twin-engined medium bomber, had entered service in the late 1930s and formed a core component of Bomber Command’s early-war strength. Although primarily designed for bombing operations, the aircraft was well suited to long-range flights carrying leaflet canisters rather than high-explosive ordnance.
Execution of the Mission
Operating from airfields in France, RAF crews undertook a demanding winter flight deep into Central Europe. Night operations were employed to reduce the risk of interception and anti-aircraft fire. Navigational challenges were considerable. Radio navigation aids were limited in capability at this stage of the war, and crews relied heavily on dead reckoning and visual fixes where possible.
The aircraft crossed hostile territory to reach Prague and Vienna, where they released large quantities of printed material over the cities. While the physical effect of such a mission was intangible compared with bombing, its psychological and political dimensions were significant.
The sortie marked the first time RAF aircraft had penetrated so deeply into German-controlled airspace since the outbreak of hostilities. Although German air defences were still developing their coordinated night-fighter system, the risk to crews was real. The mission demonstrated both the reach of Bomber Command and its willingness to operate beyond immediate front-line areas.
Immediate Results and Operational Implications
The leaflet raid achieved its immediate objective: the distribution of Allied propaganda over two major Central European cities. German authorities responded by attempting to suppress the materials and control information dissemination. While it is difficult to measure the direct impact on civilian morale, the operation signalled that the air war would not be confined to front-line regions.
Strategically, the mission formed part of a broader policy of limited offensive engagement during the early war period. The British Government continued to restrict bombing to military targets and avoided attacks on densely populated urban centres. Leaflet operations allowed Bomber Command to maintain activity, test long-range navigation procedures, and provide crews with operational experience without prematurely escalating the conflict.
Significance in the Wider Air War
The events of 12 January 1940 represent an early stage in the evolution of the RAF’s strategic air campaign. Within months, the tempo and character of operations would change dramatically as Germany launched its offensive in Western Europe and bombing campaigns intensified on both sides.
In retrospect, the leaflet raid on Prague and Vienna illustrates the restrained posture adopted by Britain during the initial phase of the war. It also highlights the role of air power as a tool not only of physical destruction but of psychological influence. The mission demonstrated operational capability, navigational reach, and organisational coordination at a time when the broader strategic situation remained uncertain.
As the air war expanded in scale and severity later in 1940 and beyond, these early sorties stand as a reminder of a brief period when propaganda rather than explosives formed the principal payload of RAF bombers over the European continent.