Okay kiddo, so the Islamic Military Alliance is a group of Muslim countries who have come together to work together to keep their countries safe. It's like when you and your friends team up to play a game and protect each other.
The countries in this group have decided to use their military forces to work together and protect each other from threats like terrorists, extremists, and other bad guys who want to do harm to their countries.
They want to create a strong defense system so that they can quickly respond to any threats or attacks. Kind of like when your parents put a lock on your front door to keep bad people from coming in.
But, just like how your parents tell you to be friends with everyone and not just certain people, this alliance also says they want to work with other countries, even if they're not Muslim, to make the world a safer place for everyone.
So, in summary, the Islamic Military Alliance is a group of Muslim countries who have teamed up to work together to keep their countries safe from bad people who want to do harm. They want to create a strong defense system and also work with other countries to make the world a better place.