The beginning of the Reconstruction period of American history is represented by which number?

The number representing the beginning of the Reconstruction is 10, mostly in reference to the Ten Percent Plan.

This was a programme annonced by President Abraham Lincoln before the end of the Civil War, in 1863.

This reconstruction plan would allow a Confederate state to form a new local government and be readmitted to the U. S. Congress if 10% of their citizens agreed to take an oath of loyalty to the Union. These 10% would also receive amnesty.

The Ten Percent Plan also suggested a transition from slavery to freedom for newly-freed black laborers by making them work for one year on Louisiana plantations, being paid $10 a month.