All 3 Uses

pilgrimage
in
Flags of Our Fathers
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For a few days I set aside my comfortable life—my business concerns, my life in Rye, New York—and made a pilgrimage to the other side of the world, to a primitive flyspeck island in the Pacific.†
Chpt 1.
The quest ended, symbolically, with my own pilgrimage to Iwo Jima.†
Chpt 1. *
The pain and anger of remembering what had happened to Iggy, and of the pilgrimage Doc had made himself make to Iggy's parents after the war, to give them reassurances.†
Chpt 14.

Definitions:

(1) (pilgrimage)
a journey to a special place -- especially a sacred place for religious purposes
(2) (meaning too rare to warrant focus)