In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Q: One participant in this incident invented a man named Boomer in order to replace an agreement made with H. M. Hoxie, and one phase of this incident was carried out by the Seven Trustees, including John B. Alley and Sidney Dillon. The early stages of it involved the purchase of an organization formed by Duff Green, the Pennsylvania Fiscal Agency. This scandal was largely caused by the actions of Thomas C. Durant and a man who financed the publication of the women's rights newspaper The Revolution, George Francis Train. It was reported on by the New York Sun after congressmen were bribed with discounted stock in a scheme concocted by Oakes Ames. This scandal involved illegally giving contracts to a subsidiary company, and most notably implicated in it was Schuyler Colfax. For 10 points, name this scandal involving a namesake construction company being contracted by the Union Pacific Railroad, occurring during Ulysses S. Grant's presidency.
A:
History