Gustavus Adolphus in the context of "Swedish Empire"

Line infantry was the type of infantry that formed the bulk of most European land armies from the mid-17th century to the mid-19th century. Maurice of Nassau and Gustavus Adolphus are generally regarded as its pioneers, while Turenne and Montecuccoli are closely associated with the post-1648 development of linear infantry tactics. For both battle and parade drill, it consisted of two to four ranks of foot soldiers drawn up side by side in rigid alignment, and thereby maximizing the effect of their firepower. By extension, the term came to be applied to the regular regiments "of the line" as opposed to light infantry, skirmishers, militia, support personnel, plus some other special categories of infantry not focused on heavy front line combat.

During the 17th century, despite having scarcely more than 1 million inhabitants, Sweden emerged to have greater foreign influence, after winning wars against Denmark–Norway, the Holy Roman Empire, Russia, and the Polish–Lithuanian Commonwealth. Its contributions during the Thirty Years' War under Gustavus Adolphus helped determine the political, as well as the religious, balance of power in Europe.

Gothenburg or Göteborg (Swedish: Göteborg [jœtɛˈbɔrj] ) is the second-largest city in Sweden, after the capital Stockholm, and the fifth-largest in the Nordic countries. Situated by the Kattegat on the west coast of Sweden, it is the gubernatorial seat of Västra Götaland County, with a population of approximately 600,000 in the city proper and about 1.1 million inhabitants in the metropolitan area.

King Gustavus Adolphus founded Gothenburg by royal charter in 1621 as a heavily fortified, primarily Dutch, trading colony. In addition to the generous privileges given to his Dutch allies during the ongoing Thirty Years' War, e.g. tax relaxation, he also attracted significant numbers of his German and Scottish allies to populate his only town on the western coast; this trading status was furthered by the founding of the Swedish East India Company. At a key strategic location at the mouth of the Göta älv, where Scandinavia's largest drainage basin enters the sea, the Port of Gothenburg is now the largest port in the Nordic countries. The presence of the University of Gothenburg and Chalmers University of Technology has led Gothenburg to become home to many students. Volvo was founded in Gothenburg in 1927, with both Volvo Cars, and its original parent Volvo Group (today makers of trucks, buses and marine engines) still headquartered on the island of Hisingen in the city. Other key companies in the area are AstraZeneca, Ericsson, and SKF.

Vasa (previously Wasa) (Swedish pronunciation: [²vɑːsa] ) is a Swedish warship built between 1626 and 1628. The ship sank after sailing roughly 1,300 m (1,400 yd) into her maiden voyage on 10 August 1628. She fell into obscurity after most of her valuable bronze cannons were salvaged in the 17th century, until she was located again in the late 1950s in a busy shipping area in Stockholm harbor. The ship was salvaged with a largely intact hull in 1961. She was housed in a temporary museum called Wasavarvet ("The Vasa Shipyard") until 1988 and then moved permanently to the Vasa Museum in the Royal National City Park in Stockholm. Between her recovery in 1961 and the beginning of 2025, Vasa has been seen by over 45 million visitors.

The ship was built on the orders of the King of Sweden Gustavus Adolphus as part of the military expansion he initiated in a war with Poland-Lithuania (1621–1629). It was constructed at the navy yard in Stockholm under a contract with private entrepreneurs in 1626–1627 and armed primarily with bronze cannons cast in Stockholm specifically for the ship. Richly decorated as a symbol of the king's ambitions for Sweden and himself, upon completion she was one of the most powerfully armed vessels in the world. However, Vasa was dangerously unstable, with too much weight in the upper structure of the hull. Despite this lack of stability, she was ordered to sea and sank only a few minutes after encountering a wind stronger than a breeze.

The University of Tartu (Estonian: Tartu Ülikool) is a public research university in Tartu, Estonia. It is the national university of Estonia, as well as the largest and oldest university in the country.

The university was founded in 1632 by Gustavus Adolphus, at the time the king of Sweden. Its first chancellor was Baron Johan Skytte, the governor-general of the Swedish province of Livonia.

From 1611 to 1721, Sweden was a European great power, becoming a dominant faction in the quest for control of the Baltic Sea and a formidable military power. During this period, known as Stormaktstiden ('The Great Power Era'), the Swedish Empire held a territory more than twice the size of its modern borders and one of the most successful military forces at the time, proving itself on numerous occasions on battlefields such as Wallhof, Narva, and Düna. The military of the Swedish empire is commonly (and wrongfully) recognized only as the Caroleans, which were in fact not in service until the late 17th century under Charles XI and his successor. The Swedish Empire and its modern military force was founded by Gustavus Adolphus, who inherited the throne in 1611 at age 17. He immediately reformed the common European military based on mercenaries to a professional national army. However, before completing his vision of conquering the Holy Roman Empire, the warrior king was killed in action in 1632. His daughter and successor did little to improve Sweden's military position and abdicated early, providing the Swedish Empire with a more warlike ruler. Charles X Gustav was only king for 5 years, but conquered large amounts of territory that still belong to Sweden today (including Blekinge, Bohuslän, Skåne, and Halland). His son Karl XI would further strengthen the army by introducing the Caroleans, which were also used by Karl XII in the Great Northern War.

However, despite great successes on the battlefield, an inadequate economy and limited manpower eventually led to the demise of the Swedish Empire, which ended its 110-year period as a great power in 1721.

The six-year Truce of Altmark (or Treaty of Stary Targ, Polish: Rozejm w Altmarku, Swedish: Stillståndet i Altmark) was signed on 16 (O.S.)/26 (N.S.) September 1629 in the village of Altmark (Stary Targ), in Poland, by the Polish–Lithuanian Commonwealth and Sweden, with helped by Richelieu's envoy Charnacé ending the Polish–Swedish War (1626–1629), and freeing Gustavus to enter the Thirty Years' War.