The United States military, the scholars say, became involved in attempts to regulate the trade in so-called camp towns surrounding the bases because of worries about sexually transmitted diseases.
In one of the most incendiary claims, some women say that the American military police and South Korean officials regularly raided clubs from the 1960s through the 1980s looking for women who were thought to be spreading the diseases. They picked out the women using the number tags the women say the brothels forced them to wear so the soldiers could more easily identify their sex partners.
The Korean police would then detain the prostitutes who were thought to be ill, the women said, locking them up under guard in so-called monkey houses, where the windows had bars. There, the prostitutes were forced to take medications until they were well.
The women, who are seeking compensation and an apology, have compared themselves to the so-called comfort women who have won widespread public sympathy for being forced into prostitution by the Japanese during World War II. Whether prostitutes by choice, need or coercion, the women say, they were all victims of government policies.
“If the question is, was there active government complicity, support of such camp town prostitution, yes, by both the Korean governments and the U.S. military,” said Katharine H. S. Moon, a scholar who wrote about the women in her 1997 book, “Sex Among Allies.”
The South Korean Ministry of Gender Equality, which handles women’s issues, declined to comment on the former prostitutes’ accusations. So did the American military command in Seoul, which responded with a general statement saying that the military “does not condone or support the illegal activities of human trafficking and prostitution.”
The New York Times interviewed eight women who worked in brothels near American bases, and it reviewed South Korean and American documents. The documents do provide some support for many of the women’s claims, though most are snapshots in time. The women maintain that the practices occurred over decades.
In some sense, the women’s allegations are not surprising. It has been clear for decades that South Korea and the United States military tolerated prostitution near bases, even though selling sex is illegal in South Korea.
But the women say few of their fellow citizens know how deeply their government was involved in the trade in the camp towns.
The women received some support for their claims in 2006, from a former government official. In a television interview, the official, Kim Kee-joe, who was identified as having been a high-level liaison to the United States military, said, “Although we did not actively urge them to engage in prostitution, we, especially those from the county offices, did often tell them that it was not something bad for the country either.”
Transcripts of parliamentary hearings also suggest that at least some South Korean leaders viewed prostitution as something of a necessity. In one exchange in 1960, two lawmakers urged the government to train a supply of prostitutes to meet what one called the “natural needs” of allied soldiers and prevent them from spending their dollars in Japan instead of South Korea. The deputy home minister at the time, Lee Sung-woo, replied that the government had made some improvements in the “supply of prostitutes” and the “recreational system” for American troops.
Both Mr. Kim and Ms. Moon back the women’s assertions that the control of venereal disease was a driving factor for the two governments. They say the governments’ coordination became especially pronounced as Korean fears about an American pullout increased after President Richard M. Nixon announced plans in 1969 to reduce the number of American troops in South Korea.
“The idea was to create an environment where the guests were treated well in the camp towns to discourage them from leaving,” Mr. Kim said in the television interview.
Ms. Moon, a Wellesley College professor, said that the minutes of meetings between American military officials and Korean bureaucrats in the 1970s showed the lengths the two countries went to prevent epidemics. The minutes included recommendations to “isolate” women who were sick and ensure that they received treatment, government efforts to register prostitutes and require them to carry medical certification and a 1976 report about joint raids to apprehend prostitutes who were unregistered or failed to attend medical checkups.
These days, camp towns still exist, but as the Korean economy took off, women from the Philippines began replacing them.
Many former prostitutes live in the camp towns, isolated from mainstream society, which shuns them. Most are poor. Some are haunted by the memories of the mixed-race children they put up for adoption overseas.
Jeon, 71, who agreed to talk only if she was identified by just her surname, said she was an 18-year-old war orphan in 1956 when hunger drove her to Dongduchon, a camp town near the border with North Korea. She had a son in the 1960s, but she became convinced that he would have a better future in the United States and gave him up for adoption when he was 13.
About 10 years ago, her son, now an American soldier, returned to visit. She told him to forget her.
“I failed as a mother,” said Ms. Jeon, who lives on welfare checks and the little cash she earns selling items she picks from other people’s trash. “I have no right to depend on him now.”
“The more I think about my life, the more I think women like me were the biggest sacrifice for my country’s alliance with the Americans,” she said. “Looking back, I think my body was not mine, but the government’s and the U.S. military’s.”