 Three more attempts to revive the plan were made after Operation Flash in early May, when Croatia captured a portion of western Slavonia previously controlled by the RSK. The first initiative, begun later that month, failed because the RSK demanded that the Croatian forces pull back from western Slavonia (which Croatia declined to do). The second attempt failed simply because neither party wanted to negotiate. The final round of negotiations where the Z-4 Plan was proposed by international diplomats occurred in early August, when a major Croatian attack against the RSK seemed imminent. Despite last-ditch efforts by Galbraith to persuade Milošević and the RSK leadership to accept the plan, disagreement among the RSK leaders allowed Croatia to claim that the RSK had no intention of negotiating. The Croatian delegation, which had little interest in the negotiations and wanted to lay the diplomatic groundwork for the imminent military operation, presented its own demands to the RSK (which were also rejected). On 4 August Croatia launched Operation Storm, defeated the RSK and effectively ended the political process which led to the creation of the Z-4 Plan.
