Chargé d'affaires in the context of "Italian declaration of war on the United States"

An ambassador is an official envoy, especially a high-ranking diplomat who represents a state and is usually accredited to another sovereign state or to an international organization as the resident representative of their own government or sovereign or appointed for a special and often temporary diplomatic assignment. The word is also used informally for people who are known, without national appointment, to represent certain professions, activities, and fields of endeavor, such as sales.

An ambassador is the ranking government representative stationed in a foreign capital or country. The host country typically allows the ambassador control of specific territory called an embassy (which may include an official residence and an office, chancery, located together or separately, generally in the host nation's capital), whose territory, staff, and vehicles are generally afforded diplomatic immunity in the host country. Under the Vienna Convention on Diplomatic Relations, an ambassador has the highest diplomatic rank. Countries may choose to maintain diplomatic relations at a lower level by appointing a chargé d'affaires in place of an ambassador.

On 11 December 1941, four days after the Japanese attack on Pearl Harbor and three days after the United States declaration of war against Imperial Japan, Nazi Germany declared war against the United States, in response to what was claimed to be a "series of provocations" by the United States government when the U.S. was still officially neutral during World War II. The decision to declare war was made by Adolf Hitler, following two days of consultation. It has been referred to as Hitler's "most puzzling" decision of World War II. Publicly, the formal declaration was made to American Chargé d'affaires Leland B. Morris by German Foreign Minister Joachim von Ribbentrop in the latter's office. Benito Mussolini also announced Italy's declaration of war against the United States on 11 December. Later that day, the U.S. declared war on Germany, with Germany's action having eliminated any remaining meaningful domestic isolationist opposition to the U.S. joining the European war.

In diplomatic usage, head of mission (HOM) or chief of mission (COM) from the French "chef de mission diplomatique" (CMD) is the head of a diplomatic representation, such as an ambassador, high commissioner, nuncio, chargé d'affaires, permanent representative, and sometimes to a consul-general. Depending on the context, it may also refer to the heads of certain international organizations' representative offices. Certain other titles or usages that would qualify as a head of mission or equivalent also exist. While they are primarily referred to by the other titles mentioned above, it is common for the diplomatic corps of a country to use deputy head of mission or deputy chief of mission (DCM) as the primary title for the second in command of a diplomatic mission.

In diplomatic missions and foreign services where ambassadors may be political appointees rather than career diplomats, the deputy chief of mission may be the senior career foreign service professional and generally understood to be more than a "deputy."

Leland Burnette Morris (February 7, 1886 – July 2, 1950) was an American diplomat. He was the first United States Ambassador to Iran, serving that post from 1944 to 1945. Earlier he was United States Ambassador to Iceland from 1942. Morris served many other diplomatic posts including American Consul General in Jerusalem in 1936, American Consul General in Vienna from 1938 to 1940 after the German annexation of Austria and the American chargé d'affaires in Germany during the outbreak of official American involvement in World War II.

Morris was a native of Fort Clark, Texas. His mother was Susan Frances (née Reece) Morris and his father was Louis Thompson Morris, a colonel in the United States Army.

This is a list of diplomatic missions of the Holy See. Since the fifth century, long before the founding of the Vatican City State in 1929, papal envoys (now known as nuncios) have represented the Holy See to foreign potentates. Additionally, papal representatives known not as nuncios but as apostolic delegates ensure contact between the Holy See and the Catholic Church in countries that do not have diplomatic relations with the Holy See.

At present, there is one residential apostolic delegate, for Jerusalem and Palestine, as well as non-residential delegates for four countries (Brunei, Laos, Mauritania, and Somalia) and for the territories and countries without diplomatic relations with the Holy See in three regions (the Arabian Peninsula, the Caribbean, the Pacific Ocean). For Vietnam, the 21st-century appointees of the Holy See have been given the title "pontifical representative". In keeping with the "one China" policy, no representative is appointed for mainland China, and the Holy See is represented in Taipei by an apostolic nunciature, headed not by a nuncio, but only by a chargé d'affaires.