Ukraine has made some important advances amidst the bloody fighting it has endured, but the front line is very long and mostly static, US Chairman of the Joint Chiefs of Staff Mark Milley said on Friday. For the time being, it is more likely that the focus will remain on defence in order to stabilize the front, he said. And depending on how quickly weapons deliveries from international partners and training of the Ukrainian military on new weapons systems progress, a significant counteroffensive by Ukraine to liberate as much Ukrainian territory as possible is also an eventuality, he said. “So…