Cuchulainn is a legendary hero from Irish mythology, known for his incredible strength and martial skills. He is often depicted as a young warrior who defends the kingdom of Ulster against invaders. His most famous exploits include single-handedly holding off an army and achieving great feats of bravery. Cuchulainn's story is primarily told in the epic tale called the Táin Bó Cúailnge, where he battles the forces of Queen Medb of Connacht. He is also recognized for his unique battle frenzy, known as the ríastrad, which transforms him into a fearsome warrior. His legacy continues to influence literature and culture in Ireland and beyond.