nitpick, at least Soviet Union had the rank Generalissimo that outranked Marshal. Spain during Franco also had the rank Generalissimo, but unsure if they also had a Marshal rank. --Dalen 22:24, 18 May 2006 (UTC)
"The US military also maintains a supreme rank known as General of the Armies of the United States, often considered the equivalent to a six star general. The only person to ever be promoted to this rank was George Washington on 4 July 1976, retroactive to 4 July 1776."
Not so. The rank was created in 1919 and awarded to Pershing. He was the seniormost officer in US history for 57 years until the retroactive promotion of Washington, which did occur in 1976, but in October. --18.104.22.168 00:57, February 17, 2010 (UTC)