Therefore encountering Demetrius at Amphipolis
he came near to being expelled from Thrace1
, but on Pyrrhus' coming to his aid he mastered Thrace
and afterwards extended his empire at the expense of the Nestians and Macedonians. The greater part of Macedonia
was under the control of Pyrrhus himself, who came from Epeirus with an army and was at that time on friendly terms with Lysimachus. When however Demetrius crossed over into Asia
and made war on Seleucus, the alliance between Pyrrhus and Lysimachus lasted only as long as Demetrius continued hostilities; when Demetrius submitted to Seleucus, the friendship between Lysimachus and Pyrrhus was broken, and when war broke out Lysimachus fought against Antigonus son of Demetrius and against Pyrrhus himself, had much the better of the struggle, conquered Macedonia
and forced Pyrrhus to retreat to Epeirus.