This was forced by the situation at that time, but with the constant adaptation of women on the battlefield, they removed the redundant part of the skirt, so Kazakhstan would not be bound to fight because of the skirt, which also improved the combat efficiency of Soviet female soldiers a lot. Later, someone specially made exclusive combat uniforms for these female soldiers, which was a great honor for Soviet female soldiers because they had their own military uniforms.
Moreover, at that time, Soviet female soldiers were considered as cannon fodder, and they thought that female soldiers could not compare with male soldiers in any way. Therefore, the female soldiers at that time were very unconvinced and inspired the fighting spirit of the Soviet female soldiers. They killed the enemy heroically on the battlefield, creating one record after another, leaving the soldiers who made sarcastic remarks speechless. This shows how strong the Soviet female soldiers were at that time, fighting for their dignity. This spirit is really worth learning.
This is the reason why Soviet female soldiers fought in skirts. There may be other reasons I didn't say, but I know so much. After all, we don't know much about Soviet female soldiers.