The fragile truce -- the sixth in just three months -- held only nine days. Last week the Serbian-dominated Yugoslav army, charging that Croatia had violated the cease-fire, launched a new offensive aimed at crushing resistance in the rebel republic. The main targets of the onslaught were the key Croatian towns of Vukovar, Vinkovci and Dubrovnik, Yugoslavia's best-known tourist attraction on the Adriatic coast. As warships blockaded the port city, air- force jets bombed and strafed it, while artillery pounded the area, leaving Dubrovnik without electricity and water.
At week's end the leaders of Serbia and Croatia agreed on the outlines...