Philippines President Ferdinand Marcos, Jr. is in Washington this week, capping off a period in which Washington-Manila ties have seen a sharp turnaround. During former President Rodrigo Duterte’s six-year tenure, he sought to align Manila closer with Beijing, but with ultimately little to show for it. Since taking office last June, Marcos has moved to reverse course, dramatically deepening the 70-year-old U.S.-Philippines security alliance amid China’s increasingly coercive actions in the South China Sea. It is expected that Marcos and President Joe Biden will announce this week plans for stepped up military coordination.