In the 1990s, abandoned children tried to sue the US Government, seeking US$68 million for 8600 minors ignored by fathers serving with the Navy and Marines. When that did not work, the community backed a bill extending the Amerasian Act to include the Philippines and Japan - to no avail.
Now China's claims to most of the South China Sea have put the Philippines back at the heart of US strategy in Asia. A new defence pact will see the US military build facilities at five Philippine bases and a growing number of ships will be stopping by Subic Bay.
Their return is renewing questions about what the United States owes Filipino Amerasians - and stoking concern that there will be more neglected children when the ships leave harbour once again.
"Why would we welcome them back?" asked Brenda Moreno, 49, a Filipino Amerasian who was all but abandoned as a child. "They will just create new babies that they will not support."
ABOUT SUBIC BAY
1 The Spanish Navy built a port at Subic Bay in the late 1800s.
2 The Americans moved in when they annexed the Philippines in 1898.
3 During the Vietnam War, Subic harboured dozens of US ships, and some 30,000 Filipinos worked at the base. Thousands more lived in the city that surrounds it, Olongapo.
4 Young women from across the Philippines moved to find work in the wartime boomtown.
It was during the war era that Moreno's mother, who worked in a bar, became pregnant. Moreno knows very little about her parents except that her Filipina mother gave her up when she was young. She told Moreno that her father was an African-American serviceman.
Raised by another woman, Moreno was mocked for looking different than other children, teased relentlessly for her dark skin and curly hair. "I wanted to change my blood," she said. "I thought if I could change my blood, I might be accepted as Filipino."
In the 1980s and 1990s, as anti-colonial sentiment surged, so did the stigma of being the child of an American.
Enrico Dungca, a photographer based in New York, grew up in Angeles City, outside Clark Air Base, in the late 1970s and early 1980s, and remembers the cruel words his Amerasian neighbours endured. They were called "bye, bye, Daddy," "half dollar" or "souvenir."
"I saw the bullying back then," said Dungca, who is now working on a photo project about the lives of Filipino Amerasians. "And I see how it still affects them now."
A disproportionate number of Filipino Amerasians live on the margins of the margins, enduring high rates of poverty and ill health, even by Philippine standards. Often abandoned as infants or raised by young single mothers, many have struggled to find their feet as adults.
After a chaotic childhood in Manila, Moreno returned to Subic at 23 to find work and entered the sex trade, working the same stretch of "girly bars" as her mum had. She found a sense of place and purpose volunteering at a sex-worker-led rights group, Buklod, but never gave up hope of connecting with her father.
That quest is a touchstone for many here who treasure even the smallest fragments of information - a name, military branch or faded picture. Some are simply curious about where they came from. Others are looking for a lifeline or a way out.
Online message boards and Facebook groups such as "Amerasian Children Looking For Their American GI Fathers" are full of young Filipinos seeking information about fathers they never met. Occasionally, a former military man posts requests for information about the woman and child he left behind.
I saw the bullying back then. And I see how it still affects them now.
Richfield Jimenez, 40, a welder in Subic, heard about his American father as a boy, but stopped asking his mother about him because the questions always brought tears. Since his mother, Salud Parilla, died in 2013, he has wondered about finding his dad but is not sure where to start. He may have lived in Arkansas, he said - that's all he knows.
Those who locate their fathers don't always get the welcome or recognition they crave. To be eligible for US citizenship, the Philippine-born children of Americans must get paternity certifications by the time they turn 18. Those separated from their fathers when the base closed in 1992 are no longer eligible.
When Washington and Manila started talking about the Enhanced Defence Cooperation Agreement that will see more US troops on Philippine soil, many advocates for Filipino Amerasians saw an opportunity. So far, though, there has been no talk of a deal.
Although many people in Subic and Olongapo welcome the cash that comes with visiting ships, some are wary of the US return.
Alma Bulawan, president of Buklod, the rights group, says they are bracing for a rise in abandoned and neglected kids.
In her decades in Subic, she has seen an endless stream of ship and sailors. The one constant: "They leave".