 When her husband Francis II died in 1560, Mary, now 19, elected to return to Scotland to take up the government.She gained an agreement that she would be the only person to partake legally in Catholic services and did not attempt to re-impose Catholicism on her subjects, thus angering the chief Catholic nobles.Her six-year personal reign was marred by a series of crises, largely caused by the intrigues and rivalries of the leading nobles.