the "defensive" faction trait unlocks a whole line of one handed spears (the default "Kraxis" race has that, but you can also make your own faction with it if you don't like them). their shields don't look like bucklers, though; the only buckler-like shield in the game is the round shield, and "defensive" repaces that with their bronze shield that looks more like the shields used by ancient greek hoplites (phalanx) - pretty similar to what the spartans use in the movie "300"