The High Mobility Artillery Rocket System (HIMARS) was the star of a simulated assault exercise by 5,500 US and Philippine soldiers, unleashing six missiles at distant targets from a dry riverbed three hours' drive from Manila.
US Marine Cobra attack helicopters and Philippine S211 jets also buzzed over the Crow Valley training range as Filipino and US troops acted out the capture of imaginary enemy-held territory.
The exercises were staged in the shadow of a festering dispute between the poorly equipped US ally and regional giant China over islands, reefs and waters in the resource-rich South China Sea.
"I think we will be more than happy to share," he said when asked if the US would deploy HIMARS to the Philippines in the case of armed conflict over the South China Sea.
The system's range is 300 kilometres, Toolan said, meaning it could hit vessels far from the Philippine landmass.
China claims most of the South China Sea, even waters and rocks close to the coasts of several neighbours that overlap with their claims.
Although, the US has not taken a stand on the conflicting claims to the South China Sea, it has opposed China's efforts to claim the waters and has stressed freedom of navigation in the vital sealane.
"We have seen the capability. It is highly mobile, lethal. So I think it is one of the capabilities we want to have," Philippine Navy Vice-Admiral Alexander Lopez said as he watched the missile firing.
Lopez, the commander of Filipino forces in the South China Sea, told reporters this would "raise the skill and the respect for your armed forces, not only for the Filipinos but also in our region".
The truck-mounted missile system had been flown aboard a giant military transport plane to an airport near the Crow Valley firing range earlier in the day from the western Philippine island of Palawan.
