Homer Plessy violated the Separate Car Act. He violated this law by sitting in the railroad car designated for whites only when he was considered black.
In the story of Oedipus he was given a prophecy saying that he would kill his father and marry his mother. And in the end of the story he does end up killing his father and marrying his mother. This is foreshadowing, a clue or event that has happened before that tells of an event that will happen in the future.
B. The Nazi invasion of Poland drew England and France into war against Germany.
Religious revivement. these two events brought religion back from near death