Australia on Friday launched its largest military exercises with Philippine forces, involving more than 3,600 military personnel in live-fire drills, battle maneuvers and a beach assault at a Philippine town facing the disputed South China Sea,

Footage shows a Chinese coast guard vessel chasing a Philippine boat and then ramming a Chinese warship. It was the latest confrontation in the contested waters.

China and the Philippines are trading blame over an incident earlier this week in which two Chinese ships collided in the South China Sea, where both nations have competing territorial claims.