Country borders are the defined lines that separate one nation from another. These borders can be natural, like rivers and mountains, or artificial, created by treaties and agreements. They help establish the territory of a country and determine where its laws and regulations apply. Borders can change over time due to conflicts, negotiations, or changes in political power. For example, historical events like wars or treaties, such as the Treaty of Versailles, can lead to the redrawing of borders. Understanding country borders is essential for geography, international relations, and global trade.