The Declaration of Independence is a

Document sent to king George during the revolution basically saying You don't own us anymore, In a nutshell it was history's first break up text, hahahaha

A Declaration of Independence or declaration of statehood is an assertion by a defined territory that it is independent and constitutes a state. Such places are usually declared from part or all of the territory of another nation or failed nation, or are breakaway territories from within the larger state.