The latest figures show that from August 2014, Pentagon has spent almost $3 billion to fight against ISIS in Iraq and Syria. Despite mounting concerns in Congress over the Obama administration's strategy for defeating the Islamic State, the U.S. already has spent billions on the war -- with recent Pentagon figures showing just how costly and complicated the operation has become. A Pentagon breakdown shows the military has spent more than $2.74 billion on the fight against ISIS, amounting to about $9.1 million a day, from August 2014 through early June 2015. The breakdown of operational costs is only part of the picture. Pentagon officials testified to Congress earlier this week that the military's training and airstrike missions make up just two planks of the administration's nine-point strategy for confronting ISIS -- a strategy that involves several other departments. Of the billions spent so far, the Air Force has gotten the bulk of the money – about 67 percent, or $1.8 billion -- underscoring the importance of the airstrike mission. Special Operations Command received 7 percent, or $700,000. Critics, though, continue to question the strategy and endgame for confronting the terror group, let alone the cost. This is while, Congress still hasn't approved a basic authorization for use of force, for a military mission that began in Iraq last August, and in Syria a month later. Rep. James McGovern, D-Mass., made a bid earlier this week to formally call for the withdrawal of troops. The House on Wednesday defeated his resolution in a 288-139 vote. Also, Republicans criticized the plan because it restricted the president’s power to wage war. In contrast, Democrats took issue with Obama’s blueprint because it wasn’t restrictive enough.