Robbing Uncle Sam

Robbing Uncle Sam is the 17th mission in Los Santos. As well as the 17th overall.

Walkthrough
Some suppressive fire must be delivered during this mission, which requires the use of some better weapons. Regardless, some SMG ammo will definitely suffice.

CJ and Ryder plan to steal weapons for GSF, and so they get into a Mule delivered by LB. Upon arriving at the National Guard depot, however, Ryder discovers that it's locked.

CJ must then climb over the walls and defeat the military personnel there, then destroy two number pads, so the gates will open and allow Ryder in.

Ryder will attempt to defend CJ with a 9mm while CJ uses the Forklift to load crates. Each time one is loaded, a short cut-scene triggers. Six crates must be loaded before the Ryder enters the back of the truck. Ryder will come under constant fire from the enemies, and they don't seem to stop spawning before the truck is loaded, so it's advisable to help him a bit by leaving the forklift, doing a drive-by, or just running them over.

The enemies may attempt to pull CJ out of the vehicle, though it's only a matter of killing the enemy and re-entering the vehicle for the work to progress.

CJ then drives the Mule to LB's lock-up, which is near Emmet's place. Along the way, two military Patriots will attempt to chase the truck. CJ can use the horn for Ryder to drop explosive munitions to fend off the chasers. Ryder will die if he is caught in the blast or the truck is overturned to it's side, though the truck cannot be damaged by the explosions. It is optional with the explosives, however, as they will give up if CJ delivers the truck to the destination.

Trivia

 * Uncle Sam is a reference to the common personification of the United States, which appeared as early as the 18th century.
 * The Mule has infinite explosive ammunition crates.
 * If the Patriot's drivers are killed, they will teleport to the Mule when the chase is supposed to happen.
 * They have increased mass and invincibility the moment they exit the garage. This can be proven if a Rhino Tank or a heavy vehicle is spawned using cheats near the gates where they leave - The tank will not damage them and they will easily push the tank away. These properties are lost as soon as they depart, and thus can't be saved.
 * They are also locked.
 * This is the only time where the Military pursues CJ with this vehicle. Usually, it's either the Barracks, the Rhino, or the Hydra.
 * This is the only time, outside of Side Missions, that a Patriot can appear in LS.
 * Health and armor pick-ups can be found in the crates, and they can occasionally contain weapons.
 * If too many crates are destroyed, the mission will still fail, unless the truck is fully loaded.
 * This is one of the few times where military NPCs are pursuing the player even when not wanted by the law.
 * They also only use Pistols, instead of M4s.
 * The Mesa driven by the soldiers during this mission has a unique green color not found anywhere else. Additionally, it will spawn in two variants: With extended and contracted roof.
 * It can be saved by either failing the mission or completing the mission. For the latter, one must return to the garage, however, and verify if the Mesa was still there. It is safer with the first approach as a result.
 * The Forklift used during this mission is bullet-proof, likely for balancing reasons.
 * It can be acquired in a similar fashion to the Mesa.
 * The Mule used during this mission is explosion-proof, as Ryder would have destroyed the vehicle otherwise.
 * After the end of the mission, the Mule will remain there, unlocked and free for taking.