The Vikings, around the 10th century AD, have always been a nightmare for European countries, as far west as Britain, France and Germany, and even many countries in Eastern Europe can see the Vikings, and also have a profound impact on the culture of many invaded countries. Supposedly, the descendants of the Vikings should also be very fierce, heroic and good at war, why would they be completely conquered by a widow with a young child, and even enshrine her as the de facto co-master of the three Nordic countries.
The widow's name was Margaret, and she was no ordinary person. Her father was the King of Denmark, and her husband, who died young, was King Haakon VI of Norway at the time. When Margaret was 10 years old, she was married to Norway by her father and became an important link between the two countries. Life after marriage was uneventful, and the most critical turning point was that Margaret's young son was identified as the Crown Prince of Norway, legally eligible to inherit the throne.
Unexpectedly, before his son could grow up, her husband, Haakon VI, died prematurely. In this case, it would be nice that Margaret was able to keep her son's throne, but Margaret was great in that she not only kept her son's throne, but also let him inherit the Danish throne.
When his son Olaf was young, Margaret's father died, and Denmark had no king or crown prince overnight. Olaf, who had already confirmed his succession to the Norwegian throne, was also eligible to inherit the Danish throne. Under Margaret's manipulation, the other candidates for the Danish throne were defeated one by one, and Olaf naturally became the king of Denmark.
At a young age, Olaf was already the co-owner of Norway and Denmark. However, the weather was unpredictable, and Olaf, who was already destined to become the king of the two countries, died prematurely before he could enjoy the royal power. Margaret, who had suffered the loss of her son, did not back down, but used all means and used a large number of benefits in exchange to make the Danish parliament recognize her status as "regent".
Margaret then adopted a boy and used Danish influence to force the Norwegian parliament to recognize the adopted son as a legitimate heir. The adoption of the Norwegian throne by her adopted son was only the first step for Margaret, who was soon recognized by the Norwegian parliament as the "regent" of the country.
At this time, there was another serious upheaval in Sweden, which was close to Norway, and the differences between the Swedish king and the nobles were seriously widened, and the nobles of the country, in order to ensure their own interests, invited Margaret to become the "regent" of their territory, trying to use the Norwegian and Danish armies to rebel against the Swedish king.
Under the attack of the combined Danish and Norwegian forces, the Swedish army was far from being a rival to the two countries. After the defeat of Sweden, the king was ousted, and Margaret consolidated her position and staged a good play in Sweden that "it is easy to ask God to send God to be difficult". At this point, Sweden, Denmark and Norway, the homeland of the three Vikings, were all controlled by Margaret.
In order to make her rule last, and to pave the way for her adopted son, Margaret single-handedly promoted the alliance of the three kingdoms. According to the alliance at that time, the three countries were independent, but needed a common monarch to manage, and the army and diplomacy were controlled by the co-lord. Margaret's adopted son became the first Lord of the Three Kingdoms, and Margarita was the actual Master of the Three Kingdoms.