U.S. Secretary of State Michael Pompeo has assured the Philippines that a defense treaty would apply if its vessels or planes are attacked in the South China Sea, sparking a debate within the Southeast Asian nation over whether it should drop plans to review the 1951 agreement.

¡°China¡¯s island-building and military activities in the South China Sea threaten your sovereignty, security and therefore economic livelihood, as well as that of the U.S.,¡± Pompeo said at briefing Friday with Foreign Secretary Teodoro Locsin in Manila. ¡°As the South China Sea is part of the Pacific, any armed attack on Philippine forces, aircraft or public vessels will trigger mutual defense obligations¡± under the treaty.

In response, Locsin said there was no need to review the U.S. Philippines Mutual Defense Treaty, adding Pompeo and President Donald Trump assured that ¡°We have your back.¡± Presidential spokesman Salvador Panelo said the statements showed the U.S. was backing Philippine claims to disputed parts of the South China Sea, and said American troops could be deployed in a shooting war.