Leon Trotsky
Head of the Red Army (spring 1918)

On 13 March 1918, Trotsky's resignation as Commissar for Foreign Affairs was officially accepted, and he was appointed People's Commissar of Army and Navy Affairs—in place of Podvoisky—and chairman of the Supreme Military Council. The post of commander-in-chief was abolished, and Trotsky gained full control of the Red Army, responsible only to the Communist Party leadership, whose Left Socialist Revolutionary allies had left the government over the controversial treaty of Brest-Litovsk.

The entire Bolshevik leadership of the Red Army, including People's Commissar (defence minister) Nikolai Podvoisky and commander-in-chief Nikolai Krylenko, protested vigorously against Trotsky's appointment and eventually resigned. They believed that the Red Army should consist only of dedicated revolutionaries, rely on propaganda and force, and have elected officers. They viewed former imperial officers and generals as potential traitors who should be kept out of the new military, much less put in charge of it. Their views continued to be popular with many Bolsheviks throughout most of the Russian Civil War, and their supporters, including Podvoisky, who became one of Trotsky's deputies, were a constant thorn in Trotsky's side. The discontent with Trotsky's policies of strict discipline, forced conscription and reliance on carefully supervised non-Communist military experts eventually led to the Military Opposition, which was active within the Communist Party in late 1918–1919.
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