Several European nations maintained diplomats in place who had been appointed to the U.S., but no country appointed any 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. The Confederacy appointed Ambrose Dudley Mann as special agent to the Holy See on September 24, 1863. But the Holy See never released a formal statement supporting or recognizing the Confederacy. In November 1863, Mann met Pope Pius IX in person and received a letter supposedly addressed "to the Illustrious and Honorable Jefferson Davis, President of the Confederate States of America"; Mann had mistranslated the address. In his report to Richmond, Mann claimed a great diplomatic achievement for himself, asserting the letter was "a positive recognition of our Government". The letter was indeed used in propaganda, but Confederate Secretary of State Judah P. Benjamin told Mann it was "a mere inferential recognition, unconnected with political action or the regular establishment of diplomatic relations" and thus did not assign it the weight of formal recognition.