They were prominent in the defence of Constantinople during the Fourth Crusade. Of the role of the guard, it is said that "the fighting was very violent and there was hand to hand fight with axes and swords, the assailants mounted the walls and prisoners were taken on both sides". The latest mention of the Varangian guard is in the Greek version of the "Chronicle of the Morea", which states that this unit escorted the Prince of Achaia away to prison after the Battle of Pelagonia in 1259; historian D. J. Geanakoplos suggests they were reconstituted by Theodore I Laskaris to strengthen his claim as the rightful Emperor. People identified as Varangians were to be found in Constantinople around 1400.