Towards the end of the mission when you need to destroy the AA units. A crate is on the shoreline on the eastern edge of the island. Its right near the water. Grab this before destroying the AA units because the mission ends as soon as they're destroyed.
From the area where you need to destroy the AA units fly south-southwest to a small island that is a little way off of the coast. Pedro is on this island as well as a crate. Same thing as before. Get this before destroying the AA units.
From the start of the mission, after you drop the tank off, fly north along the coast until it turns to the west. Follow the coast just a little bit more. A crate is on the beach right near the waters edge.
Again, from where you dropped off the tank. Fly east-southeast. There is an island off shore with a lighthouse. The crate is on the beach of this island.
Directly north from the lighthouse island and just across the water on a beach is Pedro. He’s in an area with a fence and a few small huts. You can see him from where you picked up the crate near the lighthouse.
From the stadium that you follow the convoy to. While hovering over the stadium look to the north west. There is a tall apartment building with a bright light on the top of the building. Pedro is standing right near that light. You should be able to see the light from the stadium.
From the stadium fly south-southeast. In a small yard near some bigger apartment buildings is a crate. It's very near the stadium. You don't need to fly for more than a second or two to find it.
From the stadium fly directly east. There will be a block of apartment buildings with a fountain in the center of the square. The crate is in this area. From the stadium you only need to fly a second or two. Very close to the stadium.
When Pierce is on the train Max will say something like "They're coming from the city." At this point the train should be going around a right hand bend. At the bend you'll want to fly due west where you should see a rock formation with smoke rising up behind it. Behind the rock formation is Pedro near a burning truck.
Pierces train will come to a stop and your objective is to kill the enemies in the oasis. On the northern bank of the oasis hidden amongst some trees is a crate.
Once the train stats moving again you'll need to destroy four AA batteries on the train. Destroy them and then follow the train into a large city area. The train will make a full loop around this city before going into the last area in the hills. The crate is almost directly in the middle of this city. If you fly to the smokestack that is in the main part of town and fly a little ways to the northwest you'll see it. It is near a large unfinished construction building in the parking lot alongside the roadway.
This is also where you can get the Arc for the “Obtainer Of the Lost Arc” achievement. Towards the very end of the level near where the last train comes straight at you there is a bend in the track. If your facing the track in the direction Pierces train is traveling its on the left side of the track on a small hill right on the final bend. There is a giant stack of crates there that you need to destroy and the Arc is in it. You can get it before the cut scene with the train if you just fly ahead of Pierces train. The funny thing is sometimes the game will show a bright yellow light as you come into the area and that's where the Arc is.
While defending the friendly forces on the riverbank fly northwest across the river. There is a crate there in a small clearing amongst a large group of trees. Not too far from where the wooden bridge and the sand bridge are on the river.
Finish defending the river bank and wait until the convoy appears. This will open a little more of the map for you to explore. Follow the river around to the north and keep following it as it turns west. There will be a wooden bridge and right past there on the side of the riverbank will be a small dock. Pedro is standing on that dock. At that very same bridge if you turn directly north you'll see a hut and some small houses. There is a crate in this area.
After refueling mid flight you'll have to destroy helicopters that are targeting buildings. Fly to the northern end of the area that this part is in. There will be a large smokestack along with one of the buildings you're supposed to be protecting. A crate is right in the area near the large smoke stack.
Defend the beach from the enemy landing and wait until the drones appear. Don't destroy the drones until you have Pedro and the crate in this area because once the drones are destroyed the game moves forward and you can’t return to this area. Fly out to the eastern edge of the map and look for a really tall rock formation with a broken up boat right next to it. Pedro is on the very top of this formation looking out to sea.
From the rock formation that Pedro is on fly north east to a separate rock formation. There is a crate on top of this formation. You should be ale to see the crates lights from where you got Pedro.
Right from the very start of the mission turn your chopper 90 degrees to the left and face east. You'll see a dirt road heading out of town. Follow that road down just a little ways and Pedro is there. You can actually see him flashing right from where you start the mission so just hover until you can see him.
Provide air support for your convoy until you're told that the enemy is coming from all sides. The convoy will come to a stop. Look south-southeast and you'll see two large low laying oil tanks behind a larger stand up oil tank. There is a crate near the two big round tanks.
From the last crate fly east-northeast just a little ways and you'll see an area with a few small houses and a few small trees. There is a crate in the middle of this area. You may actually need to fly out of the mission area to grab it but it is possible to pick it up
Well I get up in the morning and I get my brief. I go out and stare at the world in complete disbelief. It's not righteous indignation that makes me complain. It's the fact that I always have to explain. - Van Morrison