The goal is to light up all of the lanterns. So after you've completed this grueling task, the puzzle is solved, right? Ha! We haven't even hit the halfway point yet. Lighting all the lanterns enables a keypad on the back of one of the pillars behind the original lantern, and pressing one of these buttons makes the lantern blink out another Morse code message, which instructs you in more extremely cryptic language to head to a different map and crouch behind a rock, as well as some crazy instructions about multiplying words together.
Find the rock and crouch by it, and you'll hear a low-pitched sound effect. To proceed further, you need to be savvy enough to record the sound and paste it into some goddamn sound editing software, slowing it down and adjusting the pitch until you hear song lyrics. If the Germans encrypted their messages this well, we'd still be fighting World War II.
"Sarge, we need cover fire!"
"Be right there. I just gotta open Pro Tools for a second."
Next, you have to figure out that the cryptic clue from earlier was prompting you to assign an alphanumerical value to the letters of these lyrics and do a complex math equation. Working this out will give you a code, which you can punch into the keypad from earlier, and then the lantern will give you another Morse code message that tells you how to visit yet another map and claim your prize.