Key Takeaways:

The Kremlin continues to insist that the 2022 Istanbul negotiations are the only acceptable departure point for potential future negotiations on the war in Ukraine, thereby demanding that Russia and its allies reserve the right to veto any Western military assistance to Ukraine and that Ukraine be left neutered and defenseless against future Russian aggression.
The Kremlin continues to categorically reject US-backed security guarantees for Ukraine and reveal its continued objectives of seizing control of all of Ukraine.
Russia is expending considerable diplomatic effort to court India, suggesting that the Kremlin continues to fear the impact of secondary sanctions.
Russia launched the third largest strike of the war thus far against Ukraine on the night of August 20 to 21, targeting Western regions of Ukraine and causing significant damage to civilian infrastructure.
The Ukrainian defense industrial base (DIB) continues to innovate and scale production of long-range weapons.
The Russian Ministry of Defense (MoD) officially confirmed that it replaced former Northern Group of Forces and Leningrad Military District (LMD) Commander Colonel General Alexander Lapin with Chief of Staff of the Russian Ground Forces Colonel General Yevgeny Nikiforov.
Ukrainian forces recently advanced near Novopavlivka. Russian forces recently advanced near Chasiv Yar.

Institute for the Study of War

https://understandingwar.org/backgrounder/russian-offensive-campaign-assessment-august-21-2025