The United Nations warns a million Afghan children could face starvation without immediate international aid, after the Taliban completed its sweeping takeover of Afghanistan last month. U.N. Secretary-General António Guterres spoke at a high-level U.N. donor conference in Geneva on Monday.

Secretary-General António Guterres: “The people of Afghanistan need a lifeline. After decades of war, suffering and insecurity, they face perhaps their most perilous hour.”

Monday’s donor conference raised $1.2 billion in pledges for Afghanistan. The U.S., which spent over $2.3 trillion during its 20-year occupation of Afghanistan, pledged just $64 million in aid.