"The British and Americans preferred to cede Eritrea to the Ethiopians as a reward for their support during World War II..."

Says the "History of Eritrea" page at Wikipedia. (In our "History of" project, we're proceeding through the world's 206 countries in alphabetical order.)

The resolution ignored the wishes of Eritreans for independence, but guaranteed the population some democratic rights and a measure of autonomy. Some scholars have contended that the issue was a religious issue, between the Muslim lowland population desiring independence while the highland Christian population sought a union with Ethiopia....