 Nyorera kupfuurira kweiyi ndima - Pakutanga kweHondo Yenyika II munaGunyana 1939, Kopp akabatana neFrench Foreign Legion sechikoro uye akarwa muHondo yeFrance muna Chivabvu-Chikumi 1940, achingopona Blitzkrieg iyo vazhinji vehama dzake vasina. Kopp akakuvadzwa zvakakomba ndokuitwa musungwa asi akatiza muchipatara chemauto uye akakwanisa kudzokera kuchikwata chake, zvino chaiva uto rakakundwa, kunze kweMarseilles muna August. Mwedzi wakatevera wacho, Kopp akaendeswa kumuzinda weForeign Legion muAlgeria, kwaakaremara kubva muchiuto uye akapiwa mari yepenjeni ye80. 