Ukraine's counteroffensive pushes the Russian military out of the Kharkov region

Ukraine has committed to their counteroffensive and pushed the Russian military out of the Kharkov region. However, is this a retreat or a regrouping of the Russian military?

Here's the links:
https://www.rt.com/russia/562559-mod-explains-withdrawal/

https://www.rt.com/russia/562602-ukraine-blackout/

https://www.rt.com/russia/562601-chechen-leader-ukraine-retreat/

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