KABUL, Aug 6 (INP) Tehran is accelerating campaign to exert influence, threatens to undo 16 years and half a trillion dollars’ worth of American efforts to forge a stable democratic Afghan government, the New York Times said in a report Sunday quoting several incidents of the recent past. A police officer guarding the outskirts of Farah city remembers the call from his commander, warning that hundreds of Taliban fighters were headed his way. “Within half an hour, they attacked,” recalled Officer Najibullah Amiri. The Taliban swarmed the farmlands surrounding his post and seized the western riverbank here in Farah, the capital of the province by the same name. It was the start of a three-week siege in October, and only after American air support was called in to end it and the smoke cleared, did Afghan security officials realize who was behind the lightning strike- Iran, the newspaper said.   Four senior Iranian commandos were among the scores of dead, Afghan intelligence officials said, noting their funerals in Iran. Many of the Taliban dead and wounded were also taken back across the nearby border with Iran, where the insurgents had been recruited and trained, village elders told Afghan provincial officials.   The assault, coordinated with attacks on several other cities, was part of the Taliban’s most ambitious attempt since 2001 to retake power. But it was also a piece of an accelerating Iranian campaign to step into a vacuum left by departing American forces — Iran’s biggest push into Afghanistan in decades. There is no doubt that as the United States winds down the Afghan war — the longest in American history, and one that has cost half a trillion dollars and more than 150,000 lives on all sides — regional adversaries are muscling in. Saudi Arabia and Pakistan remain the dominant players. But Iran is also making a bold gambit to shape Afghanistan in its favor. Over the past decade and a half, the United States has taken out Iran’s chief enemies on two of its borders, the Taliban government in Afghanistan and Saddam Hussein in Iraq. Iran has used that to its advantage, working quietly and relentlessly to spread its influence. In Afghanistan, Iran aims to make sure that foreign forces leave eventually, and that any government that prevails will at least not threaten its interests, and at best be friendly or aligned with them. One way to do that, Afghans said, is for Iran to aid its onetime enemies, the Taliban, to ensure a loyal proxy and also to keep the country destabilized, without tipping it over. That is especially true along their shared border of more than 500 miles. But fielding an insurgent force to seize control of a province shows a significant — and risky — escalation in Iran’s effort. “Iran does not want stability here,” Naser Herati, one of the police officers guarding the post outside Farah, said angrily. “People here hate the Iranian flag. They would burn it.” Iran has conducted an intensifying covert intervention, much of which is only now coming to light. It is providing local Taliban insurgents with weapons, money and training. It has offered Taliban commanders sanctuary and fuel for their trucks. It has padded Taliban ranks by recruiting among Afghan Sunni refugees in Iran, according to Afghan and Western officials.   “The regional politics have changed,” said Mohammed Arif Shah Jehan, a senior intelligence official who recently took over as the governor of Farah Province. “The strongest Taliban here are Iranian Taliban.” As the NATO mission in Afghanistan expanded, the Iranians quietly began supporting the Taliban to bleed the Americans and their allies by raising the cost of the intervention so that they would leave. In the empty marble halls of the Iranian Embassy in Kabul, Mohammad Reza Bahrami, the ambassador, denied that Iran was supporting the Taliban, and emphasized the more than $400 million Iran has invested to help Afghanistan access ports on the Persian Gulf.   Iran has sent squads of assassins, secretly nurtured spies and infiltrated police ranks and government departments, especially in western provinces, Afghan officials say. Even NATO’s top commander in Afghanistan at the time, Gen. Sir David Richards of Britain, discovered that Iran had recruited his interpreter, Cpl. Daniel James, a British-Iranian citizen. Corporal James was sentenced to 10 years in prison for sending coded messages to the Iranian military attaché in Kabul during a tour of duty in 2006. More recently, Iran has moved so aggressively in bulking up the Taliban insurgency that American forces rushed to Farah Province, a second time in January to stave off a Taliban attack. “The Iranian game is very complicated,” said Javed Kohistani, a military analyst based in Kabul. INP/AH