third island chain
By extension, from second island chain
- (politics, India) The Andaman Islands, Nicobar Islands, Sumatra; from Burma in the north to either the Indonesian Archipelago, or Australia in the south.
- (politics, US) The Aleutian Islands, Emperor Seamounts, Hawaiian Islands, Line Islands, New Zealand; from Alaska to New Zealand or Tasmania and Australia.
Geopolitical terminology, regarding the presumed geopolitical control zone aspired to by a rising People's Republic of China.