April 2003, 1/3 departed Kaneohe for another UDP in Okinawa, Japan. Alpha company, with Weapons company reinforcements left for the Philippines as the MSE under the guise of JTF-510. Alpha company carried out many joint missions with Navy SEAL/s, SWCC, and the CIA in terrorist surveillance activities, and security missions in Zamboanga Bay. Also, despite the constant threat of attack from the Abu Sayf, and the MILF (Moro Islamic Liberation Front), Alpha carried out security for many Engineering Civic Action Programs (ENCAPs) by building schools and repairing hospitals deep in the jungle. Alpha Company Navy Hospital Corpsman also carried out two major MEDCAPs seeing a total of 17,000 patients.