This monograph examines China's approach to using sea power to defend and advance its maritime claims in the East China Sea and South China Sea. This approach, which Chinese strategists sometimes called "echelon defense," involves the use of non-military instruments of sea power--especially maritime law enforcement forces--to vie with other states for control over disputed maritime space. These non-military forces operate on the first line (or echelon) of China's expanding frontier. Behind them, on the second line, China employs naval forces to deter foreign leaders from using force, thereby compelling them to compete on China's own terms. The echelon defense approach allows China to gradually achieve its objectives without risking a conflict or giving other great powers such as the United States sufficient grounds to intervene. Since 2006, when this approach was pioneered, it has enabled China to expand its influence and control in maritime East Asia. But it has also harmed China's relations with its neighbors and other great powers. Discover more products: Other products produced by the United States Navy, Naval War College (USNWC) can be found here:https://bookstore.gpo.gov/agency/naval-war-college-nwc Maritime resources collection here:https://bookstore.gpo.gov/catalog/maritime-transportation-shipping Resources relating to China can be found here:https://bookstore.gpo.gov/catalog/china