It’s often called the “Canadian Cross” but technically the large cross behind the Tomb of the Unknowns and near the memorials to astronauts is called the “Cross of Sacrifice.”
The bronze sword atop the 24-foot gray granite cross was dedicated on Armistice Day 1927 in remembrance of Americans who fought in World War I as part of Canadian forces. The cross represents religious faith and the sword is for being in a military cemetery.
Many Americans joined Canadian forces to fight in World War I before the U.S. entered the war. The cross is also in Canadian military cemeteries of at least 40 graves.
Designed by Canadian Sir Reginald Boomfield, it has an inscription by the Canadian Prime Minister Mackenzie King. Similar inscriptions were added after World War II and the Korean War.