Kapodistrias called on the British and French residents to support him in putting down the rebellion, but this they refused to do. Nonetheless, an Admiral Rikord (or Ricord) took his ships north to Poros. Colonel (later General) Kallergis took a half-trained force of Greek Army regulars and a force of irregulars in support. With less than 200 men, Miaoulis was unable to make much of a fight; Fort Heidek on Bourtzi Island was overrun by the regulars and the brig "Spetses" (once Laskarina Bouboulina's "Agamemnon") sunk by Ricord's force. Encircled by the Russians in the harbor and Kallergis' force on land, Poros surrendered. Miaoulis was forced to set charges in the flagship "Hellas" and the corvette "Hydra" to blow them up when he and his handful of followers returned to Hydra. Kallergis' men were enraged by the loss of the ships and sacked Poros, carrying off plunder to Nauplion.