Denmark and Sweden are descendants of the Vikings. Why are they old rivals?

Because Denmark and Sweden have territorial disputes.

Kingdom of Denmark: Denmark for short, one of the five Nordic countries, is a constitutional monarchy country with two autonomous territories, the Faroe Islands and Greenland. The north faces Sweden and Norway across the North Sea and the Baltic Sea, collectively known as Scandinavian countries. The south is bordered by Germany, the capital and the largest city, Copenhagen.

A unified kingdom was formed around 985 AD, and the Viking Age reached its peak in the 8th ~11century. 14th century, it became one of the European powers. 1June, 397, under the leadership of Queen Margaret I, it formed the Kalmar Alliance with Sweden and Norway and became the leader of the Alliance. The first national flag in the world is the Danish flag born in 12 19, which is called "the power of the Danes".

Kingdom of Sweden: Sweden (Swedish for short) is a country located in Scandinavia, one of the five Nordic countries, and its capital is Stockholm. It borders Norway to the west, Finland to the northeast, scarborough-Geraker Strait and kattegat to the southwest, and the Baltic Sea and Botswana Bay to the east.

Sweden faces Denmark, Germany, Poland, Russia, Lithuania, Latvia and Estonia across the sea, with a coastline of 7,624 kilometers and a total area of about 450,000 square kilometers. It is the largest country in Northern Europe.

In the 8th-11century, Viking entered its heyday. Around 1 100, Sweden began to form a country. Since 1397, it has been a member of the Kalmar Union controlled by Denmark, and 1523 regained its independence. The Swedish Empire, which existed from 16 1 1 to 172 1, was once one of the European powers. Sweden declared neutrality in both world wars and is a permanently neutral country.

Extended data:

Places of interest in Denmark:

Danish National Museum: Located in the southeast corner of Copenhagen City Hall, founded in 1740, it is the largest and richest museum in Denmark. There are a lot of unforgettable permanent exhibits in the collection, including a large number of Egyptian and Roman cultural relics displayed in the museum.

Bronze statue of mermaid: located in Longglini, northeast of downtown Copenhagen, she sat quietly on the shore of the harbor and looked sad.

Places of interest in Sweden:

Nobel's former residence: Baihua Villa in Cascuga, central Sweden, more than 200 kilometers away from Stockholm. 1894, alfred nobel ended his overseas wandering career and returned to his motherland to settle down, where he spent most of his last two years.

Swedish Palace: It is the place where the king works and holds celebrations, and it is also the main tourist attraction in Stockholm. Located in the center of Stockholm. Built in the17th century, it is the work of the famous Swedish architect Trier.

References:

Baidu Encyclopedia-Denmark

Baidu Encyclopedia-Sweden