What major technological advancement is used to destroy Guernica and change warfare forever?

necluar weapon is used to destory Guernica and change warfare forever

where are the statements?

beowulf is considered an epic poem because it describes the actions of a great warrior.

beowulf is taken into account an epos. in this poem, the main character may be a hero who travels nice distances to prove his strength at not possible odds against supernatural demons and beasts. in the poem, beowulf was a young warrior and he leaves his country to hrothgar, as hrothgar was in a great trouble.