Ka cika wannan magana: Matashin Edward ya shiga rundunar sojan ruwa yana ɗan shekara 12 da bindigogi 60. An aika da "Superb" zuwa West Indies tare da Admiral Francis Hosier. Boscawen ya zauna tare da "Superb" na tsawon shekaru uku a lokacin
Yaƙin Anglo-Spanish. Daga bisani an sake sanya shi zuwa,, kuma a karkashin Admiral Sir Charles Wager kuma yana cikin "Namur" lokacin da ta shiga cikin Cadiz da Livorno bayan yarjejeniyar Seville wanda ya kawo karshen tashin hankali tsakanin Birtaniya da Spain. A ranar 25 ga Mayu, 1732 Boscawen ya ci gaba da zama Laftanar kuma a watan Agusta na wannan shekarar ya koma tsohuwar jirginsa na 44-gun na hudu "Hector" a cikin Bahar Rum. Ya kasance tare da ita har zuwa ranar 16 ga Oktoba 1735 lokacin da aka inganta shi zuwa 70-gun. A ranar 12 ga Maris, 1736, Admiral Sir John Norris ya ba Boscawen matsayi na wucin gadi na 50-gun. Kwamitin Admiralty ya tabbatar da haɓakarsa. A watan Yuni 1738 an ba Boscawen umurnin, karamin kashi na shida na bindigogi 20. An umurce shi da ya bi Admiral Edward Vernon zuwa West Indies a shirye-shiryen yaki da Spain.