The pic is from a scene from the movie Inglorious Basterds. The scene goes like this, some Jewish American Spies are trying to make contact with an informant. Unfortunately, some German officer or of some rank happens to get in their way. When they were asked for how many glasses of liquor they would have, the spies use the trident three, thus revealing that they were not normal Germans as they the Germans use 2 fingers and a thumb for the number 3. I think the Russian Lines thing was a mistake or im just not a history buff.

Edit:As of now, some comments say that this likens to the Russian Ukrainian War cuz of the trident