KABUL, Afghanistan (AP) — The U.S. says it has conducted its first airstrike against Taliban forces in Afghanistan, after signing an ambitious peace deal with the militant group days before in the Mideastern state of Qatar.

U.S. military spokesman Col. Sonny Leggett said in a tweet Wednesday that it was the first U.S. attack against the militants in 11 days. He said the “defensive” attack was to counter a Taliban assault on Afghan government forces in Nahr-e Saraj in the southern Helmand province.

Leggett added that Taliban forces had conducted 43 attacks on Afghan troops on Tuesday in Helmand.

Leggett called on the Taliban to stop the attacks and uphold their commitments based on the agreement signed on Feb. 29 between their leaders and U.S. peace envoy Zalmay Khalilzad in Doha, Qatar, which lays out a conditions-based path to the withdrawal of American forces from Afghanistan.

President Donald Trump confirmed Tuesday that he spoke on the phone to a Taliban leader, making him the first U.S. president believed to have ever spoken directly with the militant group responsible for the deaths of thousands of U.S. troops in nearly 19 years of fighting in Afghanistan.