Washington (CNN) President Donald Trump on Monday vowed the US will "fight to win" in Afghanistan, extending the 16-year campaign there with a promise to beef up the American military presence while ratcheting up pressure on other countries in the region to help turn the tide. In a prime-time address before a crowd of US troops, Trump sought to convince the country that he was applying a different strategy to the enduring Afghan conflict. But he offered few details, sticking to broad outlines -- beating back the Taliban, annihilating terrorists and cracking down on Pakistan's harboring of militants -- that shed little daylight between the current and future US approaches to the 16-year war.