On June 24, 2023, the mercenary Wagner Group reportedly took over the Russian military headquarters in which city, during the early stages of its failed rebellion?

On June 24, 2023, the mercenary Wagner Group reportedly took over the Russian military headquarters in which city, during the early stages of its failed rebellion?

Samara
Novosibirsk
Nizhny Novgorod
Rostov-on-Don
Saint Petersburg

The correct answer is Rostov-on-Don