Intro
"Farewell to Cheyenne" from the original score to Once Upon a Time in the West by Ennio Morricone
I couldn't find the background chords to this theme so decided to work it out.
A minorAm D MajorD A minorAm
Am D MajorD A minorAm D MajorD
G+G BB E minorEm
Em D MajorD
A minorAm D MajorD A minorAm
Am D MajorD A minorAm D MajorD
G+G BB E minorEm
Em D MajorD
Pretty sure this is right though there is some moving bass notes below the chords, particularly on the Em.
See the link: http://www.filmmusicnotes.com/
ennio-morricones-score-for-once-upon-a-time-in-the-west-part-2-of-3-cheyennes-theme/