During the mobilization waves of March and August of that year, all peace-time units were deployed to airfields throughout the country and attached to respective commands of Air Force, Naval Air Service and squadrons supporting each of the Polish armies.
In the last stages of the air campaign, whole units coordinated all actions in the fight against the invaders.
In addition, the Polish air forces had a number of PZL.37 Łoś and PZL.23 Karaś bombers, as well as a number of non-combat planes used for reconnaissance, observation, communications, army cooperation and transport.
The strategic reserve of the commander in chief of the Polish Army consisted of two air brigades stationed around Warsaw and additional communications squadrons used for easier handling of orders from the headquarters to respective armies.
Altogether, on 1 September 1939 Edward Rydz-Śmigły had 146 combat aeroplanes and 60 non-combat planes at his disposal.