历代内忧外患之多莫过于明王朝,即以外患为例,不只是有来自西、北方的传统侵犯威胁,还有新出现之东部海域的倭寇之祸。为适应战事需要,海防也成为当时兵书涉及的一项重要内容,专著也大量出现,以致自明朝后期出现了中国军事著述史上的第二次高潮。明代郑若曾所撰《筹海图编》等为其中的代表性著作。 Much of the internal and external problems in history have been beyond the Ming dynasty, that is, taking other countries as an example, not only the threat of traditional encroachments from the west and the north, but also the pirates of the newly emerged eastern seas. In order to meet the needs of the war, the defense of Haiphu also became an important part of the military writings involved. A large number of monographs were also appeared, resulting in the second peak in the history of Chinese military writings since the Ming Dynasty. Zheng Ruo Ming Dynasty had written “raise sea charts” as one of the representative works.