 Ramba uchinyora ndima iyi - Achiri muduku zvikuru nokuda kwebasa rechiuto pakatanga Hondo Yenyika II, Boscawen akaenda kuTrinity College, Cambridge, kwaakaverenga sayenzi yemichina ndokutora kosi chaiyo yeinjiniya yechiuto. Muna 1941, akabatana neRoyal Engineers. Zvisinei, musi wa4 Gunyana 1942, akagadzwa semutevedzeri wechipiri mu1st Battalion yeColdstream Guards iyo nhengo dzemhuri yake dzaive dzashandira kubvira 1769, kusanganisira vakoma vake George naEvelyn, avo vakaurayiwa panguva yekubuda muDunkirk, uye nhamba yake yebasa yaiva 243507. Bhatani racho raiva chikamu che5th Guards Armoured Brigade, chikamu cheMajor General Allan Adairs Guards Armoured Division, uye Boscawen akatumirwa kuchikwata chevatasvi vemabhiza cheSandhurst kunodzidziswa semutungamiriri wetangi. Muna September 1944, pashure pokurwisana muHondo yeNormandy, battalion yake yaiva pakati pematangi okutanga kupinda muBrussels. Vhiki rimwe mushure mekunge Operation Market Garden yapera, akapihwa Military Cross MC panguva yekurwisa kweGerman kurwisa Nijmegen bridgehead. 