From June to September, Vasilevsky was assigned to a series of reserve regiments, and finally arrived at the front in September as a half-company commander ("polurotny") in the 409th Novokhopersky regiment, 109th division, 9th Army. In the spring of 1916, Vasilevsky took command of a company, which eventually became one of the most recognized in the regiment. In May 1916, he led his men during the Brusilov offensive, becoming a battalion commander after heavy casualties among officers, and gaining the rank of captain by age 22.