Sigemund's story is mentioned in Beowulf to draw a parallel between the two heroes. Both Sigemund and Beowulf display courage, strength, and glory in their respective exploits, illustrating the heroic code of the time. Sigemund's story serves as a foil to Beowulf's own achievements, highlighting the legacy and prowess of these great warriors.
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Grendel's defeat at the end of the battle in Beowulf is attributed to Beowulf's strength and skill in combat, as well as the assistance of his warriors. Beowulf's ability to rip off Grendel's arm is a crucial moment in the battle that ultimately leads to Grendel's defeat.
Beowulf offered to help Hrothgar by defeating the monster Grendel that was causing him sorrow. Beowulf sympathized with Hrothgar's plight and saw an opportunity to prove his worth as a great warrior.
Beowulf's sword is useless against Grendel's mother because her skin is too tough for it to penetrate. The sword shatters upon impact, leaving Beowulf vulnerable in the battle. Ultimately, it is Beowulf's strength and willpower that allow him to defeat Grendel's mother.
Unferth
He tore his arm off.
While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.
Poets in the mead hall would sing about heroic deeds, battles, legends, and tales of valor. Their songs often glorified warriors and their ancestors, instilling pride and a sense of identity within the community. This oral tradition helped preserve the history and values of the society.
Grendel's arm was hung in the rafters of Herot as proof of his defeat by Beowulf.
While Grendel's mother is hard for Beowulf to defeat, he IS able to use a sword, where as he has to battle Grendel bare handed.
Beowulf brings back the head of Grendel and the hilt of the magical sword used to defeat Grendel's mother.
No one else was able to defeat Grendel because he was protected by a magical charm that made him impervious to weapons from humans. Beowulf was able to defeat Grendel because he fought him with his bare hands, which allowed him to overcome the monster's defenses.