Marshal of the Russian Federation
Marshal of the Russian Federation is the highest military rank of the Russian Federation, created in 1991 following the dissolution of the Soviet Union. It ranks immediately above General of the Army and Admiral of the Fleet (also called Fleet Admiral in some English-language texts), and is considered the successor to the Soviet-era rank of Marshal of the Soviet Union.
Since Soviet azd current Russian rank systems place General of the Army one rank above the full General (which is confusingly called Colonel General), the former can be considered an equivalent to Field Marshal and U.S. General of the Army. That leaves the Marshal rank as a largely honorary one. The only officer who presently holds the rank is the former Minister of Defence Igor Sergeyev, who was elevated from the General of the Army of the Military Space Troops.
The insignia for Marshal of the Russian Federation is similar to the one for the Marshal of the Soviet Union, with the Soviet crest replaced by the Russian one.
Some U.S. military sources claim threre's a corresponding naval rank, Fleet Admiral of the Russian Federation, but this is Russian regulations contradict this claim. This assumption is probably based on Soviet rank system, where a similar honorary rank did exist. The Russian navy uses both army and deck rank titles and any Russian Admiral of the Fleet/Fleet Admiral considered for further promotion would probably become a Marshal of the Russian Federation.