There was a secret war between the USA and the Philippines over a disputed island - Apparently.
In 1974, the United States government secretly bombed and mined the island of Pag-asa, which is part of the Spratly Islands in the South China Sea. The incident was a response to a Philippine claim to the island, which was part of the US's post-war withdrawal from the Philippines. The US Navy and Air Force conducted the attacks, which were not publicly acknowledged until 1995, when the Philippine government declassified the documents.