January 3, 1993 -- The U.S. and Vatican City establish full diplomatic relations.
The United States and Vatican City established full diplomatic relations after 117 years.
Vatican City is an ecclesiastical or sacerdotal-monarchical state, ruled by the Bishop of Rome—the Pope. The highest state functionaries are all Catholic clergymen of various national origins. It is the sovereign territory of the Holy See and the location of the Pope's residence, referred to as the Apostolic Palace.
This move by the United States brought Vatican City officially into EUCOM’s Area of Responsibility, a pre-defined geographic region assigned to a combatant commander of the Unified Command Plan defining an area where they have the authority to plan and conduct operations.
Currently EUCOM has 51 independent countries within its AOR. These countries extend beyond Europe into the Caucuses and include Israel.