Given the task definition and input, reply with output. 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.

One of the bloodiest battles in this nation's history occurred at Hauganes, and ended with the execution of Brandur. The greatest and in fact only naval battle in this nation's history took place two years earlier, and was known as "the Bay Battle. " The civil war in which those battles were fought also included a battle in which Gissur the White and Kolbeinn the Young proved victorious in 1238. That period of conflict is known as the Age of the Sturlungs, which came to a conclusion with the signing of a so-called "Old Covenant" that put an end to this country's commonwealth, which had been founded in 930. FTP, name this island nation whose current republic was established in 1944 after it achieved independence from Denmark, which is governed by the Althing.
History