I tried looking other places but came up short, so fuck it.

Flip the UVs themselves in your editor, maybe.

probably textured view is bugged. try viewing it in material mode

Did you assigned the material and texture for the backpack mesh? That may be the problem..

Is the backpack mesh in the object with the rest of the soldier?

Do you have any additional materials or textures?
My guess is that the backpack uv is assigned to some additional default material that overlaps the material with your texture, and thus it's rendered normal.

>>567796
It doesn't show up in material mode either
>>567825
Its all one object, some parts were joined but only the backpack is giving me problems

>>567851
check how many UV channels you have and if the UV have the same faces as the backpack.
unwrap again if all fails