LONDON (AFP) - British Foreign Secretary David Miliband sought Tuesday to play down suggestions by his country's top military commander in Afghanistan that multinational forces would not achieve a "decisive" win there. Brigadier Mark Carleton-Smith's comments at the weekend that "we're not going to win this war", only reduce the Taliban insurgency to manageable levels, had been twisted, Miliband wrote in his official blog. The foreign secretary said success did not mean "killing every Taliban", but ensuring the Afghan government was in control. "His (Carleton-Smith's) comments are an honest and compelling attempt to engage with the reality of how to deal with a counter-insurgency," he wrote. "Defeating the Taliban's attempt to usurp the government of Afghanistan is a vital project - in seven years it has made real progress. "But it is not the same as killing every Taliban, and it comes at a cost in human life and also setbacks." Meanwhile, US Defense Secretary Robert Gates on Wednesday urged his counterparts from the southeast Europe to send more troops to Afghanistan, in particular to help train the army there. "As the situation on the ground in Iraq continues to improve, I urge you to consider sending your military forces to Afghanistan where there is an urgent need for trainers as they expand their army," Gates told reporters in the lake resort of Ohrid, in southwest Macedonia. The Afghan army plans to almost double its troops in next three to four years to 134,000 soldiers in a bid to push back the gains made by the Taliban-led insurgency.