Armored Personnel Unit

Armored Personnel Units are vehicles in How It Should Have Ended. They originate in The Matrix.

Background
Armored Personnel Units, or APUs for short, are hydraulic mechanized walkers designed for combat that appear in The Matrix. They formed part of the primary line of defense for Zion. More than 120,000 units were produced by the time of the Battle of Zion, only 350 remain (although onscreen when Captain Mifune gives his speech there is only around 70 APUs present). Its main armament are two 30mm rapid-fire cannons attached to its arms. All motion of the APU is controlled by the operator's hands, including its legs. APU operators were required to pass a training program.

APU armor is ironically minimal, favoring speed and firepower over bulky protection. The armor originally used on APUs, as seen on the UN version, would do very little to defend against machines who've proven many times to be capable of cutting open or slicing quite quickly through the toughest armors Zion can produce. To some people, this separation of man and machine with a lacking cockpit is also symbolic of who is in control and who is not.

APUs are armed with two 30mm machine-guns.

How The Matrix Revolutions Should Have Ended
An APU is being controlled by a generic pilot in an opinion slide at the end of the video. The slide itself is criticizing the city of Zion, who, according to the slide, should have considered more practical defenses before the Battle of Zion.

Trivia

 * The APU is the first mech featured on How It Should Have Ended and the second vehicle overall, after the phone booth from Bill and Ted's Excellent Adventure.