While attached to the U.S.S. Pampang, Henrechon was one of a shore party moving in to capture Mundang, on the island of Basilan, P.I., 24 September 1911. Ordered to take station within 100 yards of a group of nipa huts close to the trail, Henrechon advanced and stood guard as the leader, and his scout party first searched the surrounding deep grasses, then moved into the open area before the huts. Instantly enemy Moros opened point-blank fire on the exposed men and approximately 20 Moros rushed the small group from inside the huts and from other concealed positions. Henrechon, responding to the calls for help, was one of the first on the scene. With his rifle jammed after the first shot, he closed in with rifle, using it as a club to break the stock over the head of the nearest Moro and then, drawing his pistol, started in pursuit of the fleeing outlaws. Henrechon's aggressive charging of the enemy under heavy fire and in the face of great odds contributed materially to the success of the engagement.