The drills included a crossing of the river that forms the Azerbaijan-Iran border, mirroring the threat that Iran’s armed forces had made weeks earlier.
Questioning the territorial integrity of the neighboring country, once a taboo topic, is increasingly entering official discourse both in Baku and Tehran.
Political movements based on Shia Islam have faced an uphill battle, as both the government and mainstream opposition are devoted to a secular, pro-Turkic national narrative.
The announced deals could be significant, and come shortly after the two sides patched up a period of serious political tensions. But many details remain unclear.
Officials in Karabakh are remaining tight-lipped about Iranian fuel imports, and say that Baku is using the issue as a pretext to drive out the region’s Armenian population.