Ukraine's arduous counteroffensive is "far from over," General David Petraeus has said.
Nonetheless, with enough pressure the Russian line can "suddenly break," he wrote.
Faced with this, even the US would struggle, Petraeus told CNN.
"Ukraine is applying pressure on their opponent until something breaks, at which point they will commit their reserves and strike," Petraeus and Kagan wrote.
"When the conditions are right, they're picking their way through these minefields now," Petraeus told CNN.
Persons:
David Petraeus, Frederick Kagan, Petraeus, Kagan, Tony Radakin, Patrick Bury
Organizations:
Service, CIA, CNN, Washington Post, SPG, Getty Images, Air Assault Brigade, Facebook, Air Assault
Locations:
Russia, Wall, Silicon, Ukraine, Iraq, Ukrainian, Bakhmut, Donetsk Oblast, Roman, Zaporizhzhia, Donetsk, Melitopol