Gustavus Adolphus was the king of Sweden from 1611 to 1632 and is remembered as one of the greatest rulers in European history. Under his reign, Sweden emerged as a great power in Europe. He was born in Stockholm, to Duke Charles from the Vasa Dynasty. Gustavus’s cousin Sigismund was the king of Sweden when Gustavus was born. However, his father usurped the Swedish throne, which made Gustavus the heir to the throne. He inherited the throne from his father at 17. However, with the crown of Sweden, Gustavus also inherited several border disputes, along with a quarrel for the throne with his cousin. Back then, (the early 1610s), Sweden had control only over the Baltic Sea region. However, Gustavus changes things and implemented a model of effective governance. Within a few years, Sweden became a strong European military and economic power. He was also known as a great military commander. One of the most crucial victories during his rule was the Battle of Breitenfeld, which was fought in 1631. His successful reign ended with his death during the Battle of Lutzen in 1632.