From Rostov on Don wiki--

Rostov-on-Don is the location of the Russian Southern Military District, which includes the 58th Combined Arms Army. As such, it was a key logistical hub during the 2022 Russian invasion of Ukraine and the 2023 Ukrainian counteroffensive.[16]

On 23 June 2023, amid the conflict in Ukraine, the Wagner Group, a private military company fighting on behalf of the Russian Federation, declared a rebellion against the Russian Ministry of Defence and took control of Rostov-on-Don.[17] On June 24, after reaching a negotiated settlement with the Russian government and military, the Wagner Group withdrew from the city.[18] Government