KAOHSIUNG, Taiwan—Taiwan commissioned into service a new coast guard flagship on Thursday to help counter China’s “grey zone” war tactics against the island. Taiwan’s civilian-run coast guard, which would operate as a branch of the navy during wartime, is often involved in confrontations with Chinese fishing and sand-dredging ships which Taiwan says operate illegally in its waters. Chinese-claimed Taiwan has termed these as “grey zone” tactics designed to subdue the island, seeking to wear Taiwan down with repeated drills and activities in or near its airspace and waters. Attending the commissioning of the domestically-made T$2.8 billion ($100.52 million) Chiayi in the southern city of Kaohsiung, President Tsai Ing-wen said the word “Taiwan” in English will be gradually printed on all coast guard vessels. This “demonstrates our determination to defend the blue territory of the Republic of China,” Tsai said, using Taiwan’s formal name. Coast guard fleet branch director Hsieh Ching-chin …