Group that was liberatec l in 1861 OTBeT: square

It seems like there might be a typo in your question. If you are asking about a group that was liberated in 1861, it could be referring to the Emancipation Proclamation issued by President Abraham Lincoln on January 1, 1863, which declared the freedom of all enslaved people in Confederate-held territory during the American Civil War. If you have a specific group or event in mind, please provide more details so I can give you a more accurate answer.