Confederate States of America diplomat to the Confederacy. Those nations recognized the Union and Confederate sides as belligerents. In 1863 the Confederacy expelled European diplomatic missions for advising their resident subjects to refuse to serve in the Confederate army. Both Confederate and Union agents were allowed to work openly in British territories. Some state governments in northern Mexico negotiated local agreements to cover trade on the Texas border. Pope Pius IX wrote a letter to Jefferson Davis in which he addressed Davis as the "Honorable President of the Confederate States of America". The Confederacy appointed Ambrose Dudley Mann as special agent to the Holy
Congress of the Confederate States would sit as a Constitutional Convention, the Provisional Congress established the several executive departments, virtually mirroring those of the U.S. Government. The only major exception was the Confederate Post Office which was required to be financially self sustaining. On March 4, 1861, the Confederacy adopted its first flag used throughout the Confederacy on the battlefield and at government office buildings for the duration of the Civil War. Following the Confederate attack on Fort Sumter in April 1861, the remaining six states admitted to the Confederate States of America with representation in its Congresses met in three additional sessions between July