And he began to endorse or at least tolerate provocative operations that skirted the edges of American law. Outfitted with mortars, boats, and target maps, Afghan rebels carrying CIA-printed Holy Korans in the Uzbek language secretly crossed the Amu Darya River to mount sabotage and propaganda operations inside Soviet Central Asia. The incursions marked the first outside-sponsored violent guerrilla activity on Soviet soil since the early 1950s. They were the kind of operations Casey loved most.2