After the Civil War, Lincoln required only ten percent of the state's voters to pledge an oath of allegiance to the Union before allowing former Confederate states to send representatives to Congress.
After the end of the Civil War, Lincoln wanted former Confederate states to meet a condition where only ten percent of the state's voters needed to pledge an oath of allegiance to the Union before they could send representatives to Congress again. This approach was part of his Ten Percent Plan which aimed to reintegrate Southern states into the Union once ten percent of voters took a loyalty oath.