Russia and Ukraine carried out an unexpected prisoner swap, the largest since the war began, involving 215 Ukrainians (including 108 servicemen of the Azov Regiment) for 56 Russians and pro-Moscow Ukrainians, Reuters reported Sept. 21. Among the prisoners given to Russia was Viktor Medvedchuk, a Ukrainian oligarch and pro-Russia politician, and among the released Ukrainian prisoners were the five commanders of the Ukrainian garrison at the Azovstal steel plant in Mariupol.