Drafted into the Red Army during the Russian Civil War, Mavrichev fought on the Eastern Front and after the end of the war spent several years in command positions with the Internal Troops. He returned to army units in the mid-1920s and held battalion commands in the late 1920s and 1930s. During the late 1930s he quickly advanced from regimental to division command and upon the outbreak of Operation Barbarossa commanded a rifle division in Belarus. Mavrichev and his division were encircled in the first weeks of the war, and he spent several months making his way back to Soviet lines. He never held another combat command and spent the rest of the war in army and front staff positions. Postwar, he served as chief of officer training courses and retired in 1951.