 Disruption of the Chinese logistics network was the primary Japanese objective in Guangdong province from August 1937 until October 1938.The 5th Fleet's 10th Division blockaded and patrolled the coast from Haimenchen, Zhejiang to Shantou and the 5th Destroyer Squadron patrolled the coast south of Shantou.Occasionally Japanese units from the Marianas were deployed in support of coastal blockade operations in south China.