President Joe Biden announced in April that all US troops would be withdrawn from Afghanistan by 11th September 201, the 20th anniversary of the attacks on twin towers, resulting in the longest war in American history.
Earlier this month, Biden moved up the target date for pulling all troops from the region, revealing that the US military mission would end by 31st August.
More than 2,400 US service members have died in Afghanistan, according to Gallup. The war, which has cost the US more than US$2 trillion, has left around 20,000 US troops injured.
The poll, conducted between 6th to 21st July was the second time in history that fewer than half of Americans said US involvement in Afghanistan was not a mistake, according to Gallup.
Support for sending troops into Afghanistan was high in October 2001, shortly after the US sent troops into the country, with 80% of Americans supporting the move, and 18% opposed.
Support for the war increased the next year, with a record-high 93% of Americans saying it was not a mistake to deploy troops to the country.
In 2014, backing for the war slipped. That year was the first time US adults were as likely to say it was a mistake to send troops into Afghanistan as they were to say it was not, Gallup reported.
Of the Americans polled that year, 49% said the US made a mistake sending troops into Afghanistan, while 48% said it was not a mistake.
Support rose again in 2015 and 2019. This year, it is back on par with the results from 2014, according to the polling organization.
As the US withdrawal effort nears the completion concerns are growing about the stability of the Afghan government once American forces vacate the country, particularly as the Taliban continues to make gains in the region.
Gallup polled a random sample of 1,007 adults in all 50 US states and the District of Columbia. The margin of sampling error is plus or minus 4 percentage points.
