US troops account for 70 per cent of the deaths and the bloody milestone came just days after an American review said President Barack Obama’s war strategy was “on track”.
Last year, Obama ordered an extra 30,000 US troops to Afghanistan in a bid to rout Al-Qaeda, reverse the Taliban insurgency and bring American forces home as soon as possible.
Limited withdrawals are expected to start next July, with responsibility for security being handed to Afghan forces in 2014, although Obama has acknowledged that combat troops might remain into 2015.
When asked about the death toll, a spokesman for the US-led International Security Assistance Force (ISAF) highlighted increased pushes against the Taliban as part of Obama’s surge strategy in the war.
The Taliban were ousted from power by a US-led invasion after the September 11 attacks, which Washington linked to Al-Qaeda militants being harbored by the Taliban.
There are around 140,000 international troops in Afghanistan. The nations contributing most are the United States, with 90,000 troops, and Britain, with around 9,000.
The majority of this year’s ISAF dead — 493 — are US troops, followed by Britons with 101, according to iCasualties.
The total international troop death toll last year stood at 521 while for 2008 the number was 295, the website added.
But Western public support for the increasingly deadly and costly war is dwindling in many countries that contribute troops to the international force.
Last week, 60 per cent of Americans surveyed for an ABC News/Washington Post poll thought the war was not worth fighting, up seven points since July.
The number of international troops being killed in Afghanistan is still substantially lower than the number of civilian casualties.
The United Nations said in August that the number of civilian casualties in the conflict rose by a third in the first six months of this year to 1,271, with insurgents killing seven times more civilians than NATO-led troops.
