Meretskov was appointed to command of the 7th Army. In January 1940, the Leningrad Military District was reformed and renamed "North-Western Front." Semyon Timoshenko was chosen Army Commander to break the Mannerheim Line. This Soviet offensive was checked by the Finnish Army in the Battle of Taipale. For the next offensive, the Stavka significantly reinforced the 7th Army, deployed the 13th Army on its flank and assigned substantial heavy artillery to both armies, including B-4 howitzers and Br-5 mortars.