This is a simple mod that gives some extra range to long polearm-style weapons like halberds, spears, etc. This allows you to do stuff like form actual phalanx formations, with a backline of spearmen striking from behind your shielded units.
Yes, that was a thing many armies did in real life. Phalangites, which made the core of the Macedonian phalanx, had pikes that could reach multiple meters in length. This allowed them to strike over multiple ranks of soldiers. With regular spears and such, the ones we have in Rimworld, you could still reliably thrust over a rank of shieldsmen.
I also tweaked the descriptions of the patched weapons to mention their new long reach.
File info