- 淮海战役 huáihǎizhànyì Huaihai CampaignThe Huaihai Campaign (Nov 1948-Jan 1949), one of the three major battles fought by the People's Liberation Army near the end of the Chinese Civil War; often considered the decisive battle of the war.
- 人海战术 rénhǎizhànshù human-wave strategyA military tactic of overwhelming the enemy by deploying a massive number of personnel, often regardless of heavy casualties
- 题海战术 tíhǎizhànshù mountain of homeworkThe strategy of preparing for exams by completing a vast number of practice problems; refers to an intensive teaching or study method involving an overwhelming amount of homework.
- 甲午海战 jiǎwǔhǎizhàn First Sino-Japanese Warnaval battles of the First Sino-Japanese War from 1894 to 1895