Complex sentence: Unlike elsewhere in Croatia, there had been no JNA garrisons or storage depots in Dubrovnik since 1972 and thus very few arms and munitions captured during the September Battle of the Barracks were available to defend Dubrovnik.
Split into simpler sentences: Unlike elsewhere in Croatia, there had been no JNA garrisons or storage depots in Dubrovnik since 1972. As a consequence, very few arms and munitions captured during the September Battle of the Barracks were available to defend Dubrovnik.