Ka dib markii uu ka tagay Gordonstoun horraantii 1939, Philip wuxuu dhammaystiray xilli uu arday ka ahaa Royal Naval College, Dartmouth, ka dibna dib loogu celiyay Giriigga, isagoo la noolaa hooyadiis Athens bil badhtamihii 1939. Boqorka Giriigga, George II (walaalkiis hore), wuxuu ku soo laabtay Britain bishii Sebtember si uu dib ugu bilaabo tababarka Royal Navy. wuxuu ka qalin jabiyay Dartmouth sanadkii xigay isagoo ahaa ardayga ugu wanaagsan fasalkiisa. Intii lagu jiray Dagaalkii Labaad ee Adduunka, wuxuu sii waday inuu ka shaqeeyo ciidamada Ingiriiska, halka laba ka mid ah walaalihiis, Amiir Christoph of Hesse iyo Berthold, Margrave of Baden, ay ku dagaalameen dhinaca Jarmalka ee ka soo horjeeda. Philip waxaa loo magacaabay mid midka markabka Janaayo 1940. Wuxuu afar bilood ku qaatay markabka dagaalka, isagoo ilaalinaya kolonyo ka tirsan Ciidanka Safarka ee Australiyaanka ee Badweynta Hindiya, waxaana ku xigay shaqooyin gaagaaban oo ku saabsan, on, iyo British Ceylon. Talyaaniga oo weerar ku soo qaaday Giriigga kadib
Bishii Oktoobar 1940, waxaa laga soo wareejiyay Badweynta Hindiya, waxaana loo wareejiyay markabka dagaalka ee Mediterranean Fleet.