This is reported by Defense News.
Gilday also stated the need to "prepare for battle" American ships that are in the Asia-Pacific region.
Earlier, Chinese President Xi Jinping said that China is committed to peaceful reunification with Taiwan, but will not promise to renounce the use of force.
Chinese Foreign Minister Wang Yi, speaking at the 77th session of the UN General Assembly, said that sustainable peace in the Taiwan Strait will be established only after the reunification of the island with the mainland.
He also stressed that the United States has no right to interfere in the Taiwan issue, since it belongs to China's internal affairs.