It would be great to replace the hot air balloons with spy balloons. It would be ideal if the flight altitude could be set in the mission editor.
The following text is cut from the website 16va.be
It would appear that an alert system was set up after the 1961 Berlin crisis. The Mi-4 and the Mi-8 were ready to take off from their respective home bases or from outposts such as the PVO radar sites near the inter-German border (3). Very logically, the better armed and faster Mi-24 took over from 1976 on, a date that corresponds to the arrival of the 'D' version in the GDR. The potential targets of the Mi-24 essentially fell into three categories. There were spy balloons that normally flew at high altitude. However, any balloon seemed to be suspect: according to the testimony of a staff member assigned to a radar site of the 46.ORTB (Separate Radar Battalion), the pilots were awaiting with some excitement the passing of weather balloons, which were targets that could be shot down.
In addition to the local alert section at Nohra, the squadrons were posting regularly one Mi-24 on the radar sites at Geba and Wachstedt. In June 1988 an additional crew was placed on alert for the interception of free automatic aerostats that were probably considered as potential spy balloons.