The United States is expected to announce a new $400 million package of weapons for Ukraine
apAPR 2024

While Russia may make more advances, the delivery of US weapons will quickly enable Ukraine to push back against these attacks and stymie this offensive. Russia will not achieve any major breakthroughs with this effort.
With Ukraine's Western partners providing it with long-range weapons that have an increased range, it was necessary for Russia to launch this offenisve in order to create a buffer zone so that it can keep Russian citizens safe.
There is a 30% chance that Russia will have significantly expanded its controlled territory in Ukraine by January 1, 2026, according to the Metaculus prediction community.