1, President Lincoln was influenced by various reactionary forces during his term of office, and his policies changed and wavered. However, with his own efforts and the active promotion of the people, he followed the historical trend and signed the famous Emancipation Declaration, which solved the main contradictions in American social, economic and political life at that time. This greatly damaged the interests of the southern plantation economy and eventually led to a four-year civil war, which he personally directed. He led the federal government in a resolute struggle with the slave owners of southern farms, safeguarded the unity of the country and effectively promoted the development of American society. 1865 April

Lincoln was assassinated in the theater by a deranged actor who sympathized with the south. But obviously, this is premeditated.

Murder case. 2. Kennedy's assassination occurred during1visit to Dallas on October 22nd 1963, 165438. The purpose of this visit is to help his Democratic Party carry out its election campaign and prepare for re-election in the general election to be held in June. 1964, 165438. Because of Kennedy's position on civil rights, it was difficult for him to win elections in most southern States, so he decided to make special efforts to win the support of Florida and Texas. During Kennedy's administration, he always advocated the principle of equality among domestic citizens, eliminated racial discrimination, and even advocated giving blacks more rights. This idea has greatly damaged the rights and interests of whites, who think that they are superior and blacks will always be slaves. This decision has aroused the dissatisfaction of the majority of whites. In particular, right-wingers in China also held public demonstrations against President Kennedy at1Friday, October 22nd, 1 12: 30. Kennedy was killed by Lee Harvey Oswald, but this man shouted that he was not killed by himself, but was used. Two days later, when he was detained by the police, he was shot by jack ruby and died instantly. This case has also become an unsolved case in American history.