Complex sentence: A very long war between the Free-born and the Federation has ensued from this with the Elves jumping in on the Free-born's side; both armies have also constructed semi-permanent fortifications on the Prekkendorran Heights with battles breaking out periodically.
Split into simpler sentences: A very long war between the Free-born and the Federation has ensued from this with the Elves jumping in on the Free-born's side. Both armies have constructed semi-permanent fortifications on the Prekkendorran Heights with battles breaking out periodically.