Near the end of the Clone Wars, the Grand Army of the Republic was wearing phase II armor. It had several upgrades which made it stronger and more adaptable to different climates and conditions. It lacked the life support system of the phase I which made it lighter, but necessitated additional equipment if the trooper was to be deployed in environments hostile to humans.
The Phase II armor was eventually replaced by the Stormtrooper armor of the Galactic Empire.
I held a contest make my origami version of Baby Yoda. The first submission was from Blowfish105 who, besides doing an awesome job on Baby Yoda, asked if I would make a tutorial for the Phase II trooper. How could I say no?