Task Force Southwest represents what could be the next chapter of the United States' longest war, which President Donald Trump vowed in a speech Monday to continue fighting. The Marine unit doesn't have a combat mission — like most U.S. troops in Afghanistan since 2014 — but it's quietly moving toward a more aggressive, hands on effort to train and advise Afghan troops, including having Marines get closer to the front lines. over 8 years in Stripes

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