Unsuitable for Tank Combat
Unlike the Condor Legion, where German planes were crewed exclusively by German crews, participation of German tankers in Spain was limited. Specialists under the command of Wilhelm Josef Ritter von Thoma mostly acted as instructors. Of course, they participated in combat, but their main task was to train Spanish tank crews and service the tanks. The first time that German tanks saw battle was on October 30th, 1936.
The first report on the combat use of PzKpfw I Ausf. A tanks was prepared by von Thoma by the end of November of 1936. By that moment, the tanks fought only with infantry, who fired on them with small arms. Soviet tanks were mentioned in the report, but briefly. Mostly the report discussed the resistance of the PzKpfw I Ausf. A to small arms, and even here, there was much left to be desired.