Ukrainians disrupt and derail Russian offensive as war moves to new phase

Just over a month after the first ballistic missiles slammed into Kyiv's international airport, the Russian campaign has been disrupted and derailed by stubborn Ukrainian resistance -- and in the last few days by agile Ukrainian counterattacks on several fronts.

Russian forces retain considerable -- but not overwhelming -- numerical superiority. Their armored groups have struggled against Western-supplied anti-tank weapons and Turkish-made drones. Ukrainian air defenses have punched above their weight and are now being reinforced by thousands of US-made Stinger missiles.

Poor logistical support, questionable tactics and growing evidence of poor morale among Russian battalion tactical groups have allowed the Ukrainian military to hold off Russian advances in several regions -- and begin to take the fight to the enemy.

CNN analysis of satellite imagery, social media content and official statements from both sides suggests the conflict may now be moving into a new phase: a war of attrition in which the Russians may lose more ground than they gain and suffer even greater resupply issues as the Ukrainians cut into their extended lines.