This chapter examines the claims and activities of other claimant states (other than China) – Taiwan, the Philippines, Vietnam, Malaysia, and Brunei – as well as the efforts and challenges of ASEAN as a collective body. Taiwan suffers an identity crisis because of the adherence to the one-China policy by all other claimant states. The Philippines and Vietnam have been visibly more vocal on their claims but they are unable to do much in the face of the rising China. Malaysia and Brunei have largely been silent because of their individual political and economic ties with China. ASEAN has collectively engaged through the DOC and COC but has been unable to achieve an amicable agreement, either due to the competing claims among themselves or China’s insistence on bilateral solution.