Created as IDs, dog tags became a crucial link between military families and fallen troops

“What they’re searching for is connection,” said Air Force Chaplain and Maj, Benjamin Quintanilla Jr. at Dover Air Force Base, where U.S. casualties from the wars in Afghanistan and now Iran have been repatriated. “So these dog tags become just a sacred symbol.”

From the World Wars to Vietnam and conflicts in the Middle East, military identification tags have also been a symbol of Americans’ sacrifice in global conflicts.

It’s unclear why the small metal rounded rectangles — hanging on ball chains and listing name, rank, company and other information, depending on the era — are called dog tags, according to the Pentagon.

The need to identify those fallen in battle had been spotlighted by the American Civil War, when staggering numbers of soldiers were buried as “unknown” — such as 75% of the 17,000 Union troops at Vicksburg National Cemetery, according to the National Park Service.

At the end of the Spanish-American War, the 1898 conflict that propelled the United States into global power, Chaplain Charles C. Pierce, then in charge of the morgue in the Philippines, first requested that Army soldiers be issued tags.

By the U.S. entry into World War I, all combat soldiers were required to wear them. They were an official part of the uniform by World War II.

Today, advances in forensics make tags less crucial for identification. But the religious affiliation on them is still useful for chaplains in the battlefield to provide appropriate prayers to dying or fallen troops, Quintanilla said.

And it’s the symbolism of connection that makes them irreplaceable. Surviving families treasure the dog tags their loved ones wore — and the new ones placed in honor on the casket at dignified transfer ceremonies — so much that some keep wearing them or even have them tattooed.

For troops, they’re the simplest sign of belonging.

“I can trust somebody who is wearing the same identification as me,” said Quintanilla, who first joined the Air Force as a dental technician. “It means that I was a part of something greater than myself.”

Part of a recurring series, “American Objects,” marking the 250th anniversary of the United States. For more American objects, click here. For more stories on the anniversary, click here.

Associated Press religion coverage receives support through the AP’s collaboration with The Conversation US, with funding from Lilly Endowment Inc. The AP is solely responsible for this content.