Searching online, I find that there's a 1954 Soviet film titled "Pereseklyavya Sabre" which might be the English translation as "Crossed Swords". The director was Sergey Gerasimov, and it's a historical war film set during the Russian Civil War. So the user might be referring to this movie.
: In the dukedom of Sivona, Renzo (Flynn), a charming rogue and master swordsman, becomes entangled in a political conspiracy. The villainous Pavoncello, a cunning advisor to the Duke, plots to seize power. Amidst frequent duels and narrow escapes, Renzo falls for the Duke’s daughter, Francesca (Lollobrigida), and sets out to save the kingdom. Where to Watch on OK.ru
Directed by Alexander Ivanovsky (a veteran filmmaker who began his career in the Tsarist era), "Crossed Swords" was produced by Lenfilm Studio at a time when Soviet cinema was heavily propagandized. Interestingly, while many films of the early 1950s focused on Stalinist industrialization or World War II heroism, Dubrovsky (1954) was a deliberate throwback.