The total area mentioned by Mr. Zelensky is roughly the size of the Greek island of Crete. The president said that “stabilization measures” have been completed in about half of that territory and “stabilization continues in the liberated area of about the same size.” “Remnants of occupiers and sabotage groups are being identified, collaborators are being arrested and full security is being restored,” Zelensky said in his late afternoon speech on Tuesday. Ukraine has set its sights on liberating all occupied territory after driving Russian forces back in a swift counteroffensive in the northeast, a goal that US President Joe Biden said would take a “long time” to achieve. Asked whether Ukraine had reached a tipping point in the six-month war, Mr Biden said it was hard to say. “It is clear that the Ukrainians have made significant progress. But I think it will be a long way.” Russian forces fled defensive positions, particularly in and around Kharkiv, a US spokesman said. Since Russia abandoned its main bastion in the northeast on Saturday, suffering its worst defeat since the first days of the war, Ukrainian troops have recaptured dozens of towns in a stunning shift in battlefield dynamics. Follow the latest updates below.