The U.S. Pacific Fleet Commander has warned of a possible arms race in the disputed South China Sea which could engulf the region, as nations become increasingly tempted to use military force to settle territorial spats instead of international law.

Cmdr. Adm. Scott Swift urged nations, like China, to seek arbitration to settle maritime disputes.

"My concern is that after many decades of peace and prosperity, we may be seeing the leading edge of a return of "might makes it right" to the region," Swift said on Monday in a speech in Hawaii, according to a copy seen by Reuters.