The various air force units underwent rapid development during the Great War. The backbone of the branch was the two-seater reconnaissance aircraft. From 1917, fighter planes grew in number and importance, and their task was specifically to destroy enemy planes and observation balloons. The Monarchy did not have specific bombing planes. Reconnaissance machines were also used for bombing.
Among the reconnaissance aircraft, the Hansa-Brandenburg C-I model, built according to German desikgn, stands out, but there were also machines developed by Austria-Hungary, such as the Aviatik Berg. Donations were collected in the Monarchy for the development of the air force. The badge shown in the post was also created for this purpose. The other Kappenabzeichen, labeled Flieger Korps, can be considered more of a type of branch insignia.
Most of the flying squadrons were founded after 1915. This was also the case with the 22nd, the post card of which can be seen in the opening picture. After training, this squadron was sent to the Eastern Front in March 1916, to Michalowo airfield. In July 1917, the air force was reorganized and the squadrons entrusted with various tasks were given a letter after their number. The 22D squadron performed a division reconnaissance task (D=Division). The postcard could have been made before this, because its inscription is Flik 22.