In the seven months since Russia’s invasion of Ukraine, the other former Soviet states have been adhering to a set of unwritten rules. Moscow realized that putting excessive pressure on its neighbors could destabilize the region, and therefore refrained from making too many demands of them. They were not required, for example, to recognize the self-proclaimed Donetsk and Luhansk people’s republics, or express support for the “special operation”: it was enough to remain neutral. The main condition was to not supply Ukraine with weapons and ammunition (Kazakhstan suspended all of its weapons exports, just to be on the safe side)....