Question: Why are Czechoslovak border guards speaking Russian? The Soviet Red Army would not be guarding the border with West Germany.
Question: Given that Sergeant Hulka was only the platoon's drill sergeant, that means his authority should have been done once they graduated from basic training. So why did he turn up in Germany and continue to give them orders?
Chosen answer: According to the movie's premise and plot, once they (the platoon) impressed the brass at graduation and was assigned to the Germany gig with the "EM-50", Sgt. Hulka would naturally be with them as he was their original commanding officer. Plus, it would be logical to suggest that he would personally assign himself the detail of overseeing his platoon as they were his to begin with.
He's assigned as a Drill Sergeant, that is his job. Once he was fully healed he would have been assigned another group of recruits.
Answer: He wanted to make sure that they don't screw up this very important assignment, which they did.
Answer: In 1981 Czechoslovakia was part of the Warsaw Pact and thus under the Iron Curtain. The Soviet Union would not fully allow the satellite states to do their own border security, so Soviet guards were placed.
lionhead