Why were Slaves that were not freed by the emancipation proclamation had to wait for what to get freedom?

Slaves who were not freed by the Emancipation Proclamation had to wait for the end of the Civil War and the ratification of the 13th Amendment in 1865 to gain their freedom. The Proclamation specifically targeted enslaved people in Confederate states, which were not under Union control, leaving many enslaved individuals in border states and areas loyal to the Union still in bondage. The 13th Amendment abolished slavery nationwide, ensuring that all enslaved people were freed, regardless of their location.