Military alliance

A military alliance is like when you and your friends make a promise to help each other if something bad happens. The countries also make a promise to help each other if there is a war or some kind of big problem. They promise to work together and share resources to help each other. This helps to make everyone feel safer and stronger because they know their friends will help them if they need it. Just like you and your friends look out for each other, countries do the same thing by forming military alliances.