Coast guard versus coast guard in the South China Sea-When coast guards begin to act like navies, it raises the risk of armed conflict in contested waters.

 On June 6, the Philippines participated in a trilateral exercise with Japan and the United States off the coast of the Bataan peninsula to practise freeing a vessel from pirates and stopping a suspected shipment of weapons of mass destruction.

Most significantly, the participating personnel were not from the three countries’ navies, but rather from their coast guards. The coast guard is traditionally a law enforcement agency, an extension of the police into a coastal country’s maritime territory. Increasingly, however, South-east Asia is seeing coast guards conducting foreign policy, looking and acting more like national military forces than police.

The most important reason aggressive maneuvers of Chinese Coast Guard ,Chinese navy and their fishing armada who acts like pirates.