Fly, Cher Ami, Fly!

Fly, Cher Ami, Fly! The Pigeon Who Saved the Lost Battalion by Robert Burleigh, illustrated by Robert MacKenzie, Abrams Books for Young Readers, 2008, ISBN 978-0-8109-7097-7
From the book jacket: "Cher Ami was one of 600 carrier pigeons used by the American Army during WWI. This book tells the particular story of one of the most famous flights, when a heroic pigeon, against all odds, helped rescue a lost battalion of soldiers."
The true story takes us back to the days before cell phones and radar, to a time when man and nature were perhaps a little more in tune with each other.