However, some significant changes to the leadership of the Red Army were made. Trotsky was temporarily sent to the Southern Front, while Smilga informally coordinated the work in Moscow. Most members of the Revolutionary Military Council who were not involved in its day-to-day operations were relieved of their duties on 8 July, and new members, including Smilga, were added. The same day, while Trotsky was in the south, Vācietis was suddenly arrested by the Cheka on suspicion of involvement in an anti-Soviet plot, and replaced by Sergey Kamenev. After a few weeks in the south, Trotsky returned to Moscow and resumed control of the Red Army. A year later, Smilga and Tukhachevsky were defeated during the Battle of Warsaw, but Trotsky refused this opportunity to pay Smilga back, which earned him Smilga's friendship and later his support during the intra-Party battles of the 1920s.