The Confederate States of America
The war was between the US states that withdrew(seceded) from the federal union of the United States and those who stayed in the union.
Turkey
The US withdrew missiles from Turkey.
The US withdrew missiles from Turkey.
The US withdrew missiles from Turkey.
When the Confederate States declared themselves an independent contry they withdrew from United States of America, They were no longer 'united'. The union of the states was broken because they were no longer one country. The term for this was secede.
At the outbreak of the US Civil War in 1861, the United States consisted of 19 free States and 15 slave States. Eleven slave States withdrew from the Union and made up the Confederate States of America. The Union had the greater number of States and among these States, several of them, plus Washington DC, were loyal to the Union but had slaves until the War's end in 1865.
50 states
The United States withdrew troops from Somalia
There is no limit to the number of states that may be admitted to the Union.
There were fifty states in the union of the United States of America in 2005. The last state to join the union was Hawaii in 1959.