In 2008, Kosovo, which is a small country in Europe, said that it wanted to be its own country and not be part of a bigger country called Serbia. This is called a declaration of independence, which means that Kosovo wants to govern itself and make its own rules.
Some people were happy about this, but some were not because Serbia did not want Kosovo to become independent. Serbia said that Kosovo was part of their country and it did not have the right to make its own decisions.
Even some other countries disagreed about whether Kosovo should become independent or not. Some countries did not want Kosovo to become independent because they were worried it could cause problems and might encourage other places to become independent too.
However, after a lot of discussions and debates, many countries including the United States and many European countries, recognized Kosovo as an independent country.
So, in summary, Kosovo declared that it wanted to be its own country and not be part of Serbia in 2008, which caused some disagreements and discussions among different countries. Eventually, many countries recognized Kosovo as an independent country.