Girls need education not marriage

In a lot of poorer countries and poor areas and even in certain religion, girls are forced to leave school to get married and start having a family at as young as 12. There are 1,000 of girls are dying because they have given birth at a super young age, where their body hasn't fully grown let alone they are babies themselves. So where are we expecting that in some country that this is alright. There is no way this is alright, why would we let this happen in our own country?