Haiku 1:
Grendel is now gone
Defeated by Beowulf
Only left his arm
This haiku is about how Grendel fled after being beaten by Beowulf. In the fight, Grendel lost his arm and now the people are hanging up his arm to show his defeat.
Haiku 2:
Heorot is free
Now is time to rise your mead
To thank Beowulf
In this haiku is about how Heorot is free, free from the wrath of grendel, and now that Heorot is safe everyone is enjoying themselves drinking mead, feasting, and celebrating Beowulf victory against. While celebrating his victory he is offered any gift he wants from Hrothgar as a thanks for defeating. He also got other gifts as thanks, and also did the other people from Geats.
Haiku 3:
Darkness defeated
Good has triumphed in battle
For now their is peace
This poem is similar to the first but I wrote it without using names so it can be more broad. It still relates to this story but also relates to others. Grendel is darkness and Beowulf is good. However when Beowulf comes to fight the bad guy and wins this poem could also explain that situational demonstrate it.