Why even limited Ukrainian breakthroughs will pose special challenge for Russian forces

Ukraine’s much-anticipated counter-offensive is underway. Thus far, Russian forces are holding their own in most locations. Ukrainian forces have suffered casualties, losing at least one German Leopard 2 tank. The offensive seems to center on a push south along the Dnieper River deeper into the Zaporizhzhia Oblast, and other pushes ranging east on the Donetsk Oblast front line.

Ukrainian forces are proceeding cautiously at present.