The last American plane lifted off from Kabul airport in August 2021. Below it, thousands of Afghans who helped America for twenty years watched in despair. They knew the Taliban would come for them. They knew America left them behind.
Iran watched this withdrawal carefully. They border Afghanistan. They hosted millions of Afghan refugees over the decades. They watched the Taliban retake the country with American weapons left behind. And they drew their own conclusions.
The conclusion Iran reached scared American planners. If America abandoned Afghanistan after twenty years and billions spent, they might abandon anyone. They might abandon Iraq next. They might abandon Gulf allies. They might abandon commitments to contain Iran.
Iran’s hardliners felt vindicated by the withdrawal. They always said America could not be trusted. They always said America would leave eventually. Now they had proof. They could wait out American pressure the way the Taliban waited out American occupation.
The Afghan weapons also worried American planners. Iranian agents could buy American rifles and night vision gear on Afghan black markets. They could study American technology captured by the Taliban. They could supply their proxies with equipment originally meant for Afghan commandos.
But the biggest impact came in the region’s psychology. America looked weak. America looked unreliable. America looked tired of Middle Eastern wars. And when you look weak, your enemies test you. When you look unreliable, your allies find other friends.
Iran tested America soon after. They stepped up attacks on American bases in Iraq. They supplied more weapons to the Houthis in Yemen. They enriched more uranium closer to weapons grade. They pushed every boundary to see if America would respond.
America did respond sometimes. They bombed militia sites in Iraq and Syria. They sent more warships to the Gulf. But the responses looked small compared to the provocations. Iran kept pushing. America kept responding just enough to avoid war.
