Complex sentence: He reminded Halil that Nuri Pasha had declared the Elisabethpol Governorate Azerbaijani territory and therefore banned regular Armenian units from Zangezur, which is why Armenia could not be held responsible for Andranik's activities in the region.
Split into simpler sentences: He reminded Halil that Nuri Pasha have declared the Elisabethpol Governorate Azerbaijani territory and therefore banned regular Armenian unites from Zangezur. Certainly, Armenia should not be held responsible for Andranik's activities in the region.