After two months of painstakingly slow progress on the battlefield, Ukraine appears to be escalating its counteroffensive, ramping up the deployment of extra troops to the southern front and signaling a new phase of the operation, US and Russian officials said.
Ukraine has committed more forces to the southeast of the country, a sign that Kyiv has identified potential weaknesses in Russian defensive lines, two US officials told CNN.
The Ukrainian military had been holding large…
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