Ukraine has made its fastest battlefield gains against Russian forces in two and a half years, according to a new analysis published ahead of a fresh round of U.S.-brokered peace talks. Kyiv retook 201 square kilometers of territory back from Russian troops between February 11 and February 15, the Agence-France Presse news agency reported, citing figures from the U.S.-based think tank Institute for the Study of War. The ISW tracks daily changes to the hundreds of miles of front line snaking