Senior US and Philippine officials met on Wednesday in Manila to discuss strengthening security and economic ties at a time of growing tension over China's aggressive sovereignty claims over vast stretches of the disputed South China Sea.
Philippine defence and diplomatic officials said they expected to see more US ships, aircraft and troops for training exercises and disaster and relief operations.
"What we are discussing right now is increasing the rotational presence of US forces," Carlos Sorreta, the foreign ministry's Assistant Secretary for American Affairs, told reporters. A five-year joint US-Philippine military exercise plan would be approved this week, he added.
The size of the increase in the US military assets in the Philippines, a former US colony, was unclear.
But it comes as the Philippines, Australia and other parts of the region have seen a resurgence of US warships, planes and personnel under Washington's so-called "pivot" in foreign, economic and security policy towards Asia announced last year.
US and Philippine officials say there is no plan to revive permanent US military bases in the Philippines - the last ones were closed in 1992 - and that the increased presence would help provide relief during disasters such as a typhoon last week that killed more than 700 people.
"The increase rotation presence is in areas where we have been traditionally exercising," said Sorreta. "There are other areas for example where we have been experiencing more disasters. So we might be expanding exercises there."
Wary of Washington's intentions, China is building up its own military. Its claims over most of the South China Sea have set it directly against US allies Vietnam and the Philippines, while Brunei, Taiwan and Malaysia also claim parts of the mineral-rich waters.
One US official said Washington was not ready to wade directly into the territorial dispute in the South China Sea and instead would focus on strengthening security ties with long-standing allies such as the Philippines.
"I don't think you'll see any real movement on the South China Sea," the US official said.
"I'm sure it will come up, but we aren't trying to step in and 'solve' that issue. We really want the solution to be done by the claimants themselves and are hoping the Code of Conduct discussions move forward," said the official, referring to a Code of Conduct aimed at easing the risk of naval flashpoints.
Sorreta told Reuters the Philippines also favoured an increased deployment of US aircraft and ships "so we can make use of them when the need arises", citing last week's typhoon. He said they would also welcome more US humanitarian supplies.