Ukrainian troops underestimated Russia's response to their counteroffensive, CNN reported.
Troops fighting on the southern front told the outlet they "expected less resistance."
One Ukrainian tank operator told CNN: "The biggest problem is underestimation of the enemy."
Many of the Western-trained Ukrainian troops have also started to abandon US tactics because they have proved ineffective, The New York Times reported earlier this month.
But a Ukrainian tank operator from the 15th National Guard told CNN that Western criticism is "wrong."
Persons:
—, Lotos, chatted, Vitaly
Organizations:
CNN, Troops, Service, Ukraine's, New York Times, 15th National Guard
Locations:
Ukrainian, Wall, Silicon, Russia, Kharkiv, Ukraine