Query: How many swift boats did Kerry command?
Context: Eight days later, on February 28, 1969, came the events for which Kerry was awarded his Silver Star Medal. On this occasion, Kerry was in tactical command of his Swift boat and two other Swift boats during a combat operation. Their mission on the Duong Keo River included bringing an underwater demolition team and dozens of South Vietnamese Marines to destroy enemy sampans, structures and bunkers as described in the story The Death Of PCF 43.