Karolina Hird, Kateryna Stepanenko, Grace Mappes, Mason Clark, Kat Lawlor, and Frederick W. Kagan September 21, 9:30 pm ET Click here to see ISW’s interactive map of the Russian invasion of Ukraine. This map is updated daily alongside the static maps present in this report. Russian President Vladimir Putin’s announcement of “partial mobilization” on September 21 reflected many problems Russia faces in its faltering invasion of Ukraine that Moscow is unlikely to be able to resolve in the coming months.[1] Putin’s order to mobilize part of Russia’s “trained” reserve, that is, individuals who have completed their mandatory conscript service, will not generate significant usable Russian combat power for months. It may suffice to sustain the current levels of Russian military manpower in 2023 by offsetting Russian casualties, although even that is not yet clear. It will occur in deliberate phases, Russian Defense Minister Sergei Shoigu said in an interview on September 21, likely precluding any sudden influx of Ru...