The Great Northern War (1700-1721) was an important fight that caused Sweden to lose its power. Let’s break it down simply:

1. Loss of Land:

   • Sweden was up against a group that included Russia, Denmark, and Poland.
   • After big losses, especially at the Battle of Poltava in 1709, Sweden lost important land to Russia.

2. Money Problems:

   • The long war took a lot of money and resources from Sweden.
   • Higher taxes and military costs made the economy weaker.

3. Change in Power:

   • Russia became stronger and started to play a big role in Europe.
   • Sweden’s power faded, which was the beginning of its decline.

In short, the Great Northern War had a huge effect on Sweden’s land, money, and its role in Europe.