An important part of that conflict was the battles
against the giants - the Jutes - and it included at least one very
recognisable name - that of Wotan, the origin of the Norse Odin.
Wotan was so important a figure that he was included in the
genealogy of just about every Germanic tribe which could string
together a convincing family tree.
When analysing Wotan in depth, it is obvious that
he is a magician-priest, given his described activities, not to
mention the meaning of his name. 
The Roman historians, Pomponius Mela and Pliny the
Elder, named the Baltic Sea the 'Codanus Sinus' (Codan waterway),
which is the deity form 'Godan', of which Wotan is a cognate, and
the tribal name 'Goth' is also a cognate. Perhaps surprisingly
therefore, 'Codanus' equates either to 'Wotan' or 'Goth'.
The '-an' of Codan may be a simple plural suffix,
in which case the Baltic would literally be the 'Goths' waterway'.
Did the Goths dominate the Baltic for a period before and
immediately after most of them migrated to the southern Baltic coast
in the first century BC? (As a side note it's fascinating to see how
so many of the mythological names were actual peoples: elves, giants,
and gods, all various tribes of early Germanic Scandinavians!) 
That places him as a newer arrival or honoured
personage of note among the Æsir (Asuras).
These Æsir, as any fan of Marvel comics will know,
also include Thor amongst their number, the great thunder god. He
seems to be derived from Taranis, a name which itself seems to be
formed from a pronoun added in front of the Asura name, derived
One can then conjecture that Wotan was the leader
of a group in southern Sweden (Gotland) who beat the Finns/Kvens,
but who also learned magic from them (they and the Sámi to the far
north were often noted in the sagas for their abilities with magic -
defensive and attacking capabilities rather than simple tricks
involving vanishing cabinets, of course).
For the same generation of warriors there is also
warfare against the mountain tribe in the Jotunheim range,
seemingly powerful opponents who are locked in a struggle for
regional superiority. It's almost impossible to precisely place
Wotan in chronological terms, but in theory he could well have
been responsible for forcing the Jute migration in Asgard's defeat
of the Jötnar (the Jutes themselves).
In any case, there probably were battles to
determine who was dominant in Scandinavia, and it has to be
suspected that it was the As - the Goths - who won, their name
meaning 'the Gods' in a Celtic-influenced pronunciation. 
It's a lot to take in, but all of this does tie
together. Wotan was head 'magician', chief warrior, king, a member
of the Goth tribe or group, and he had a band of Goths around him.
After battling the regional Kvens and Sámi, and also the rival
Jutes and the other (human) tribes, the Goths became the largest
and most successful tribe in Scandinavia.