Secession is the formal withdrawal of a group from a political entity. Threats of secession can be a strategy for achieving more limited goals. It is a process, which commences once a group proclaims the act of secession (e.g. declaration of independence). A secession attempt might be violent or peaceful, but the goal is the creation of a new state or entity independent from the group or territory it seceded from.
Prominent examples of secession and secession attempts include the Confederate States of America seceding from the Union, the former Soviet republics leaving the Soviet Union after its dissolution, Texas leaving Mexico during the Texas Revolution, Biafra leaving Nigeria and returning after losing the Nigerian Civil War, and Ireland leaving the United Kingdom.
There is no consensus regarding the definition of political secession, and there are many new political theories on the subject.
According to the 2017 book Secession and Se