During the Russian-Turkish war of 1787-1791 the fortress on the Danube were major military bases for the Turkish army. They are reliably protected the Balkans against the invading Russian troops. Based on studies of the memoirs of contemporaries and predecessors in this article refers to the importance of seizing the Turkish fortifications on the Danube in 1790. https://www.ngetikin.com/quick-sale-Korpskaft-Hultafors-great-choice/