Okay, so let's imagine that you are playing a game with your friends. This game is called 'Seven Years' War'. You have two big teams, one team is called 'Great Britain' and the other team is called 'France'. The goal of the game is for one team to win and the other team to lose.
Now, during the game, both teams want to win. So, Great Britain made some friends to help them win. These friends were called 'Prussia' and 'Hanover'. France also had some friends, like 'Spain' and 'Austria'.
During the game, there were many battles and fights between the two teams, but eventually, Great Britain and their friends were able to win! This was a really big deal for Great Britain because it meant that they were able to keep their territories and expand their empire, which made them really powerful and important.
Overall, the Seven Years' War was a difficult and challenging game, but Great Britain and their friends were able to come out on top and win!