[Lew]

This was what I was able to come up with that corresponds with Lucien C. Berry's service in Southern Luzon.

MIGUEL C. MALVAR
(1865-1911) Revolutionary General

Malvar returned to the country in June 1898, bringing with him about 2000 rifles that greatly helped his compatriots. Appointed commanding general of Southern Luzon, he organized the forces in Batangas, Mindoro, and Tayabas. Eventually, the Filipinos won their victory, prompting Aguinaldo to declare independence from Spanish colonialism on June 12, 1898. Unfortunately, this independence from colonial rule was short lived.
On February 4, 1899, the Philippine-American War broke out. Malvar responded to the new enemy with courage. He fought the American forces in Muntinglupa, San Pedro, Tunasan, Kalamba and Kabuyaw. Appointed division general and chief of the second zone of operations in Southern Luzon, General Malvar delegated his task with General Juan Cailles, his deputy. He fought with the forces of General Artemio Ricarte in defending several towns of Laguna.
Faced with a better-trained and better-armed enemy, the Filipinos turned into guerrilla warfare, which proved to be more effective. The American soldiers did not take this lightly. They inflicted stricter measures in stopping Malvar and other guerillas. Aimed at starving them, they took the civilians in military zones, and destroyed villages, crops and animals along with their more intense military campaign that eventually resulted to the capture of Aguinaldo in Palanan.

So it seems that this dagger could have been captured from one of these freedom fighters that fought against the American forces stationed in that area or it was a private purchase piece Berry just picked up?