This chronology lists 507 incidents of international terrorism that took place between Jan. 9, 1968 and April 26, 1974, a period marked by a rising trend in international terrorist activities. Only incidents that had clear international repercussions were included -- incidents in which terrorists went abroad to strike their targets, selected victims or targets that had connections with a foreign state (e.g., diplomats, foreign businessmen, offices of foreign corporations), or created international incidents by attacking airline passengers, personnel and equipment.