Following Rizal's death, Bracken joined revolutionary forces in Cavite province, where she took care of sick and wounded soldiers, boosting their morale, and helping operate reloading jigs for Mauser cartridges at the Imus Arsenal under revolutionary general Pantaleón García. Imus was under threat of recapture, so Bracken, making her way through the thicket and mud, moved with the operation to the Cavite mountain redoubt of Maragondon. She witnessed the Tejeros Convention on March 22, 1897 before returning to Manila, and was later summoned by the Spanish Governor-General, who threatened her with torture and imprisonment if she did not leave the colony. Owing however to her adoptive father's American citizenship, she could not be forcibly deported, but Bracken voluntarily returned to Hong Kong upon the advice of the American consul in Manila.