That is not true...when the representatives of the defeated Confederate states went to Congress in late 1865, they were turned away. It was not until their states had ratified the 13th and 14th amendments to the Constitution were the representatives allowed to return to the US Congress.
Texas was the first to attempt it in 1866.
Reconstruction Era Reconstruction Era
informal amendment process
The Provisional Confederate Congress had unanimously elected Jefferson Davis to be the provisional president of the South. This was on February 11, 1861. Later, after the US Civil War was underway, Davis was confirmed as the official Confederate president and elected to a six year term. Under the Confederate Constitution, presidents could serve only one term. There was no reelection process.
Reconstruction
Reconstruction
2012
The laws that divided the South into five military districts with a military commander controlling each district were the Reconstruction Acts of 1867. These acts were implemented by the U.S. Congress to oversee the process of Reconstruction in former Confederate states following the Civil War.
The process of admitting a new state begins with asking Congress' permission. The entire process lies in the discretion of Congress.
Reconstruction
Reconstruction
The USA has no such process under the Constitution, Congress cannot be dissolved.