Why did the Amish break away from the Mennonites?

I do believe it was the other way, Mennonities broke away from the Amish.

Amish led a very simple live, no modern items, menonities do use cars and electric item.

Amish don't believe in car, electirc, zippers on clothing. etc.

Just some of what I have learn from th menonities in my area.