Fort Sill Apache Tribal Chairman Jeff Houser sent a letter to the president Tuesday, saying equating the legendary Apache warrior to a "mass murderer and cowardly terrorist" was painful and offensive to all Native Americans.
The letter was posted Wednesday morning on the Oklahoma tribe's website.
"Right now Native American children all over this country are facing the reality of having one of their most revered figures being connected to a terrorist and murderer of thousands of innocent Americans," Houser wrote. "Think about how they feel at this point."
Houser noted Obama was elected on a message of compassion and change. Forever linking the memory of Geronimo to "one of the most despicable enemies this country has ever had" shows neither compassion to Native Americans nor change in perception of Indians or their struggle, he said.
The White House referred questions on the matter to the U.S. Defense Department, which said no disrespect was meant to Native Americans.
The department wouldn't elaborate on the use of "Geronimo," but said code names typically are chosen randomly so that those working on a mission can communicate without divulging any information to adversaries.
Meanwhile, news about the code name spread quickly across Indian Country and on social network sites, resulting in a groundswell of criticism against the government. Several tribes and tribal leaders issued statements of disapproval, while many Facebook and Twitter posted angry comments, some using historical photos of the Apache leader for their profile pictures.
Geronimo is a legend among Apaches and other Indian tribes for the fierce fighting he brought on during the 19th century as he tried to protect his land, his people and their way of life from encroachment by U.S. and Mexican armies.
Stories have been passed down about the Chiricahua Apache leader being able to walk without leaving footprints, helping him evade the thousands of soldiers and scouts who spent years looking for him throughout the Southwest.
In his letter, Houser told Obama that his tribe - like the rest of the nation - was ecstatic about learning of bin Laden's death during a raid in Pakistan. But those feelings were tempered as details about the code name emerged.
"Unlike the coward Osama bin Laden, Geronimo faced his enemy in numerous battles and engagements," Houser wrote. "He is perhaps one of the greatest symbols of Native American resistance in the history of the United States."
Geronimo was born in 1829 in what would later become the state of New Mexico. Aside from leading resistance efforts for his people, he was also known as a spiritual leader.
After the families of Geronimo and other Apache warriors were captured and sent to Florida, he and 35 warriors surrendered to Gen. Nelson A. Miles near the Arizona-New Mexico border in 1886. Geronimo eventually was sent to Fort Sill in Oklahoma, where he died of pneumonia in 1909 after nearly 23 years of captivity. He was buried in the Fort Sill Apache prisoner of war cemetery.