This catch phrase originates from the film "Officers" (1971, directed by Vladimir Rogovoy), based on a script by Boris Vasiliev, author of the famous story "The Dawns Here Are Quiet ...", and Kirill Rappoport. The words of the squadron commander, a former tsarist officer who became the commander of the Red Army and the head of the border post (actor Vladimir Druzhnikov), said in a conversation with one of the heroes of the film, platoon commander Alexei Trofimov (actor Georgy Yumatov):
“- ... Others were proud of wealth or nobility. And we are our profession.
- What is this profession?
- To defend the homeland. There is such a profession, a platoon commander. "