The rotation will allow to "stabilize the situation and positively affect the moral and psychological state" of Ukrainian soldiers, Ukraine's Commander-in-Chief said.
The concentration of the Russian military’s entire combat-capable ground force of over 460,000 in Ukraine allows Russia to conduct operational rotation of its troops in Ukraine, ISW said. This will likely sustain Russia’s offensive tempo in Ukraine.
"The absence of regular unit rotations out of combat duty is highly likely one of the most important factors contributing to low Russian morale," as per British intelligence.