Detailed Instructions: 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: His long campaign to win Livonia eventually met failure at the hands of Stephen Bathory, but he did conquer Kazan and Astrakhan and made the first Russian inroads into Siberia. The son of Vasily III, his reign was characterized by his struggles with the boyars, leading him to call the first national assembly, the zemski sobor, and establish his own state called Oprichnina within Russia. After the death of his first wife Anastasia in 1560 he experienced a decline in emotional stability which is the source of his current fame. FTP, who was this first czar of Russia, known as * "the Terrible"
A:
History