The Armenian national movement, besides its individual heroes, was an organized activity represented around three parties of Armenian people, Social Democrat Hunchakian Party, Armenakan and Armenian Revolutionary Federation, which ARF was the largest and most influential among the three. Those Armenians who did not support national liberation aspirations or who were neutral were called "chezoks". In 1839, the situation of the Ottoman Armenians slightly improved after Abdul Mejid I carried out Tanzimat reforms in its territories. However, later Sultans, such as Abdul Hamid II stopped the reforms and carried out massacres, now known as the Hamidian massacres of 1895–96 leading to a failed Armenian attempt to assassinate him.