Kammala jumla mai zuwa: A shekara ta 1914 Robb tare da rundunarsa sun shiga yaki kuma an rubuta shi a matsayin shiga wasan kwaikwayo na ayyukan (watau Faransa) a watan Afrilu 1915. An ba shi lambar yabo ta Soja yayin da yake aiki tare da Northumberland Fusiliers. Duk da yake a Yammacin Yamma tare da ƙungiyarsa Kyaftin Robb an rubuta shi a matsayin mai aiki da kuma sanannen memba na 4th Battalion da Northumberland Fusiliers. Har ma an ba shi mukamin Laftanar Kanar na wucin gadi kuma ya umurci bataliya a cikin
Yaƙin St Quentin a ranar 21 ga Maris, 1918; a lokacin wannan mummunan yaƙi ya ji rauni kuma aka kwashe shi.