BRUSSELS - NATO Secretary General Jaap de Hoop Scheffer warned European allies Monday not to complain about "Americanisation" of the mission in Afghanistan if they failed to match US contributions there.

"This is not President (Barack) Obama's war," Scheffer told reporters

"The allies need to ensure that they all do their part," he warned. "No complaints about Americanisation of this mission, if the other allies do not play their role."

Scheffer was speaking ahead of a two-day alliance summit starting Friday and in the wake of the new strategy unveiled by the US leader to tackle the Taliban-led insurgency and foster reconstruction.

Obama's plan includes sending in 4,000 more US troops and tripling US aid to Pakistan to 7.5 billion dollars over five years while sifting moderate Taliban from hard-core fighters and leading a global "civilian surge".

He has also set benchmarks for the United States, its allies and Pakistan, whose shaky government requires international help and encouragement to combat Taliban militants in its lawless tribal areas neighbouring Afghanistan.

The deployment of a further 17,000 US troops had already been announced.

"I think the Obama plan is realistic about what can be achieved and in what timelines. That means, we will not be able to turn Afghanistan into Switzerland in a few years' time," Scheffer said.

But he conceded that other allies could not match US military muscle, and urged them to contribute on the civilian side, with aid or with police training.

"The NATO allies cannot match the figures presented by the US, that is not under discussion," he said. Everyone had to play their part, he added, urging countries to "put more resources into the mission."

Since 2003, NATO nations have been trying to help spread the influence of Afghanistan's weak central government across the conflict-torn country, but its efforts have been stymied by a Taliban-led insurgency.