Prince Andrew served for twenty-two years with what organization?
Prince Andrew, Duke of York Prince Andrew, Duke of York Prince Andrew, Duke of York, (Andrew Albert Christian Edward, born 19 February 1960) is a member of the British royal family. He is the third child and second son of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. At the time of his birth, he was second in the line of succession to the British throne; he is seventh in line. He holds the rank of commander and the honorary rank of Vice Admiral (as of February 2015) in the Royal Navy, in which he served as an active-duty helicopter pilot and instructor and
Twenty Years' Anarchy problems, the speed with which the Sassanid Empire collapsed under the Arab threat, and the fact that it was being threatened simultaneously on two fronts. However the strength of the military organization within the empire, and factional struggles within the Arab world enabled it to do so. Twenty Years' Anarchy The Twenty Years' Anarchy is a historiographic term used by some modern scholars for the period of acute internal instability in the Byzantine Empire, marked by the rapid succession of several emperors to the throne between the first deposition of Justinian II in 695 and the ascent of Leo III