Bulgaria, Croatia, Germany, Greece (16 Hs 126A-1), and Spain used the Hs 126.
The Hs 126 was sometimes used to bomb and strafe.
In 1938 six were delivered to the Condor Legion in the Aufklarungsgruppe 88. Five of these survived to be turned over to Spain.
The Luftwaffe first received Hs 126s in the spring of 1938 into the Aufklarungsgruppe 35.
Invasion of Poland
The Hs 126 supplied 13 squadrons in the invasion of Poland.
Invasion of Russia
In June 1941, there were 48 Staffeln that had Hs 126B-1s.
There was on squadron of Hs 126s used in North Africa.
From 1942 the Hs 126 was withdrawn from front line service and used to tow gliders. They were also used in anti-partisan duties in the Balkans.
In mid 1942 some special night units that specialized in close support operations were equipped with the Hs 126. These were the Nachtschlachtgruppen.