Article snippet: Most popular on BostonGlobe.com Based on what you've read recently, you might be interested in theses stories WASHINGTON — President Donald Trump’s plan to end the stalemate in America’s longest war and eliminate Afghanistan’s rising extremist threat involves sending up to 3,900 additional U.S. forces, senior officials said Tuesday. The first deployments could take place within days. In a national address Monday night, Trump reversed his past calls for a speedy exit and recommitted the United States to the 16-year conflict, saying U.S. troops must ‘‘fight to win.’’ He warned against the mistakes made in Iraq, where an American military withdrawal led to a vacuum that the Islamic State group quickly filled. Trump would not confirm how many more service members he plans to send to Afghanistan, which may be the public’s most pressing question about his strategy. In interviews with television networks Tuesday, Vice President Mike Pence similarly wouldn’t give any clear answer. Instead, he cited Pentagon plans from June calling for 3,900 more troops. ‘‘The troop levels are significant, and we’ll listen to our military commanders about that,’’ Pence said. ‘‘And the president will make that decision in the days ahead.’’ U.S. officials said there was no fixed number. But they said the Pentagon has told Trump it needs that many fresh forces in addition to the roughly 8,400 Americans in the country to accomplish Trump’s objectives of ‘‘obliterating ISIS, c... Link to the full article to read more