1865: The Army of the Potomac is bottled up inside Washington DC when CS troops lay siege to the city. Blacks begin to desert the Union armies when it is found out the CSA is offering freedom to slaves if they fight for them. 1866: Washington falls to CS troops ,and is nearly destroyed by the following battle between the ANV and AP, which ends in a Confederate victory, and the US government is taken as prisoners of war and forced to make the Union itself surrende,r and soon the Congress ratifies the Confederate-written Treaty of Richmond. 1873: