On March 30, President Ulysses S. Grant signed the act that ended Congressional Reconstruction and readmitted Texas to the Union. In the aftermath of the Civil War, Texas had been in turmoil, first under Presidential Reconstruction and then Congressional Reconstruction. The latter required that Texas have a constitutional convention, with delegates elected by all male citizens over the age of twenty-one, regardless of race, color, or "previous condition of servitude." The convention was to write a new state constitution that would provide for universal adult male suffrage. In February 1870 the Twelfth Legislature adopted the Fourteenth and Fifteenth amendments and selected United States senators. This completed the requirements set for re-admission.