The Soviet Empire, an alliance in the aqua team, uses two flags shown to the right: the Soviet Empire War Flag and Official Presidential Flag.
Imperial Crown
https://archive.is/20131014115448/img849.imageshack.us/img849/2719/ministers.jpg - Soviet Emperor Personal Flag
https://archive.is/20131014115446/img846.imageshack.us/img846/8079/sovietimperialregent.png - Imperial Regent - Flag