Kammala wannan magana: Masanin tarihin Amurka Robin Winks ya ce "Abwehr" ya kasance, "rashin nasara, rashin iya hasashen
"Torch, ko kuma Husky, ko kuma Overlord". Ɗan tarihi ɗan Ingila Hugh Trevor-Roper ya ce "ta ruɗe, ba ta da tasiri sosai, [kuma] tana da wuyan ganewa a siyasa". Ya daɗa cewa a ƙarƙashin "mulkin da ba shi da kyau" na Admiral Canaris, wanda "ya fi sha'awar ƙulla makirci da Nazi fiye da ayyukansa na hukuma". Ɗan tarihi Norman Davies ya yarda da wannan bayanin kuma ya ce Canaris "ba mai goyon bayan Nazi ba ne". A cewar Trevor-Roper, a cikin shekaru biyu na farko na yaƙin shi ne "kwayar cuta mai farin ciki" wanda aka "ɗauka tare... a kan nasarar sojojin Jamus". Lokacin da yanayin ya juya kan Nazis kuma "Abwehr" ba zai iya samar da bayanan da shugabanni ke bukata ba, an hade shi cikin SS a 1944. Yawancin rashin nasarar hankali da rashin iyawa na yau da kullum sun haifar da bala'i mai ban mamaki a cikin gabashin gabashin da yammacin yakin da sojojin Jamus suka yi. A cikin littafinsa, "The Secret War: Spies, Ciphers, and Guerrillas, 1939<unk>1945," masanin tarihi Max Hastings ya yi iƙirarin cewa ban da cin hanci da rashawa ga jami'an Yugoslavia kafin zuwan su na gaggawa na 1941, ayyukan leken asiri na "Abwehr" sun kasance "ba su da nasara".