The Universal Soldier by Buffy Sainte-Marie is in B at 105 beats per minute and runs 2:02 across 33 bars. It uses 6 chords — E, C#m, F#, B, G#m, C#m7. The chord diagram changes as the song plays and the words light up as they are sung, so you can strum and sing along without reading ahead.
Want the melody line note by note? The Universal Soldier guitar melody tab.