Just three years after Congress made Armistice Day a holiday for peace, American armed forces were fighting a second world war, even more devastating than the first. The carnage of World War II gave power to the idea of trying to stop wars by establishing a rules-based international order. Rather than trying to push their own boundaries and interests whenever they could gain advantage, countries agreed to abide by a series of rules that promoted peace, economic cooperation, and security.
The new international system provided forums for countries to discuss their differences—like the United Nations, founded in 1945—and mechanisms for them to protect each other, like the North Atlantic Treaty Organization (NATO), established in 1949, which has a mutual defense pact that says any attack on a NATO country will be considered an attack on all of them.
In the years since, those agreements multiplied and were deepened and broadened to include more countries and more ties. While the U.S. and other countries sometimes fail to honor them, their central theory remains important: no country should be able to attack a neighbor, slaughter its people, and steal its lands at will. This concept preserved decades of relative peace compared to the horrors of the early twentieth century, but it is a concept that is currently under attack as autocrats increasingly reject the idea of a rules-based international order and claim the right to act however they wish.
In 1954, to honor the armed forces of wars after World War I, Congress amended the law creating Armistice Day by striking out the word “armistice” and putting “veterans” in its place. President Dwight D. Eisenhower, himself a veteran who had served as the supreme commander of the Allied Expeditionary Force in Europe and who had become a five-star general of the Army before his political career, later issued a proclamation asking Americans to observe Veterans Day:
“[L]et us solemnly remember the sacrifices of all those who fought so valiantly, on the seas, in the air, and on foreign shores, to preserve our heritage of freedom, and let us reconsecrate ourselves to the task of promoting an enduring peace so that their efforts shall not have been in vain.”