Finally, in 1380, Hongwu had Hu and his entire family arrested and executed on charges of treason. Using this as an opportunity to purge his government, the emperor also ordered the execution of countless other officials, as well as their families, for associating with Hu.
They wanted to keep their honor in the agreement made with England and wanted to gain territories in the Pacific, which in fact were held by the Germans. They would also join the allies and secure the sea lanes in the Indian and West Pacific Ocean