In response, the Chinese military said the war game, which involved the Philippines and non-regional countries including the U.S., Australia and New Zealand, "stirred up trouble" and "seriously undermined" peace and stability in the South China Sea.
Why It Matters
China has claimed sovereignty over most of the South China Sea based on "historic rights," overlapping with claims by other countries, particularly the Philippines, a U.S. treaty ally that plays a key role in Washington's strategy to counter China's assertive behaviors. Such disputes have led to standoffs and clashes between rival forces.