The Gando Massacre happened a long time ago in the country of Burkina Faso, which is in Africa. Imagine that there are many people living in that country, just like how you have many friends in your school.
But, some bad people called colonial soldiers from France came to Burkina Faso to take control of the land. These soldiers did not like the people of Burkina Faso and wanted to make them do what they said. This made the people very upset and angry.
One day, in the year 1947, some of these colonial soldiers were marching in a town called Gando. The people of Gando did not like the soldiers and they were protesting against them. The colonial soldiers got mad and started shooting at the people, even though they were not doing anything wrong.
This shooting became very violent and more than 100 people were killed by the soldiers. This is why it is called a massacre - it means that many people were killed. It was a very sad and scary time for the people of Burkina Faso.
Nowadays, people remember the Gando Massacre as a time when the people of Burkina Faso fought for their freedom and their rights. It also reminds us that we should always respect and treat each other with kindness and fairness, no matter where we come from or what we believe in.