Why did Denmark, a small country, occupy Greenland?

There is no other reason. Denmark just got a big bargain and took Greenland as its own with its weak national strength and narrow area. Let me introduce Greenland first. According to the geography textbook of junior high school, Greenland is the largest island in the world, with an area of 50 times that of Denmark. It lies between the Arctic Ocean and the Atlantic Ocean. Due to the high latitude, most areas are covered with snow and ice, and the population is small. This is a truly sparsely populated area.

Greenland was originally an uninhabited island. It was discovered when the Vikings prevailed, so it has a long history, much earlier than the geographical discovery period. By about 10 century, Norwegians gradually immigrated to Iceland and then sailed to Greenland, which is very close. The Norwegians are delighted to find that this land is very vast and nobody cares about it, so they are happy to incorporate Greenland into the Norwegian territory, which is about 13 century.

100 years later, that is, during the Renaissance of 14 century, the rulers of Denmark and Norway decided on a political alliance, namely, Denmark and the United Kingdom of Norway. All the territories of Denmark and Norway are ruled by these two countries, including Greenland. In this way, a few centuries later, Norway was occupied by Sweden, and Greenland lost its suzerain and could only belong to Denmark, which was allied with Norway. Moreover, Denmark gives full autonomy to manage Greenland, so Greenland is quite in favor of becoming a Danish territory.

However, Greenland is not a small area, it was first discovered by the Norwegians. The Norwegians don't believe that Denmark must go to such a big place, and they often make trouble for it. So, for the ownership of Greenland, the two countries that once parted ways began to hate each other and quarreled for more than a century. The International Court of Justice in The Hague officially awarded Greenland to Denmark, and Norway had to stop. So Denmark can occupy Greenland, which is cheaper than Norway.