The melody of Army Of One by Coldplay runs 325 notes across 68 bars, 3:30 long in Ab at 140 beats per minute. The tab sits low on the neck, mostly under the fourth fret, one note at a time — no chords to barre and no strumming pattern to keep up with. A piano backing track plays the chords and bass underneath, so the line you are learning sounds like the record even at half speed.
Prefer to strum and sing it instead? Army Of One chords and lyrics.