Bulgarian air defence. year 1981

Translation:
On the square are the soldiers of the missile unit.
their pride is legitimate, because they invested all their youthful strength and inspiration in mastering the most modern racket combat equipment.
With their excellent hits, the soldiers of the missile division proved once again that they are extremely loyal to the Communist Party and the people and ready at any moment to land their irresistible missile strike where the enemies of the socialist homeland dare to violate its inviolable and sacred borders.