In May 1926, during the May Coup (Poland), two battalions of the regiment (21 officers, 444 soldiers) were sent by rail to Warsaw, reaching the capital of Poland on May 14, at 8 a.m. During the street fighting, one officer (Colonel Jozef Niedzielski) was killed. The regiment, together with the 3rd Legions Division, supported Józef Piłsudski.