Vladimir Putin is traveling to the US to meet with President Trump to discuss the war that experts believed would’ve ended more than three years ago.

Days before the leaders of Russia and the U.S. hold a summit meeting in Alaska, Moscow's forces breached Ukrainian lines in a series of infiltrations this week in the country's industrial heartland of Donetsk.

"What has been building up for the Ukrainians is fundamentally a manpower issue," a former senior Pentagon adviser told Newsweek.