Tryggvaflokkr (the "Flokkr-poem of Tryggvi") was an Old Norse poem about Tryggve the Pretender, an 11th-century Viking chieftain who purported to be the son of Olaf Tryggvason and tried to conquer Norway in 1033. It is usually attributed to Sighvat Thordarson, a skald and court poet of Canute the Great. The only surviving portion of the poem is that quoted by Snorri Sturluson in the Heimskringla:
For fame eager, forth faredfrom the north King Tryggve,whilst Svein from the south forthsailed to join the battleFrom fray not far was I.Fast they raised their bannersSwiftly then-rang sword 'gainstsword-began the bloodshed.
References
Tryggvaflokkr Wikipedia(Text) CC BY-SA