When I first equipped my spear, it removed my sword and shield, I thought nothing of it since it made sense (2 handed weap). But after a while, I thought that being a warrior, I should use a shield to tank better, so I decided to switch back to the sword, I dunno why but I put the shield on first and tada, you can use spear w/ shield. I don't know if this is widely known but I don't see a lot of spearmen doing it, so I thought I'd share the knowledge.