army 陸軍，軍隊，大群，大軍

例句：Kenny is too old join the army.

肯尼超過了參軍的年齡。

navy n. 海軍

例句：Before his retirement from the navy, Paul was a commander.

從海軍退伍之前。保羅是個中校。

naval adj. 海軍的

例句：Finally, the naval warfare ended in our victory.

最終那次海戰以我們的勝利而告終。

navigation n. 航海，航空，導航，領航，航行

例句：Navigation is difficult on this river because lots of hide rocksexists.

因為有很多暗礁，在這條河上航行很困難。

marshal n. 元帥，典禮官，執行官v. 整頓，配置，匯集，排列

例句：Jason was supposed to act as the marshal's aide.

約翰遜的職責是元帥的副官。

marsh n. 濕地，沼澤，沼澤地

例句：It is very dangerous to be alone in the marsh.

一個人在沼澤地里是很危險的。

military adj. 軍事的，軍用的

例句：The citizens demanded that military spending should be decreased.

市民要求軍費應該減少。

militant adj. 好戰的，積極從事或支持使用武力的

例句：A few militant members of the crowd attacked the vendor who soldfake antiques.

人群中幾個好斗的人攻擊了那個賣假古董的小販。

troop n. 群，組，多數，軍隊vi. 群集，結隊vt. 把（騎兵）編成騎兵連

例句：The troop made their retreat from the occupied city.

部隊從淪陷的成市安全撤出。