The CIA’s mission, officials said, has been defined by the White House’s desire to seek a political settlement, a scenario that relies on an eventual stalemate among the warring factions rather than a clear victor. As a result, officials said, limits on the agency’s authorities enable it to provide enough support to help ensure that politically moderate, U.S.-supported militias don’t lose but not enough for them to win.
....U.S. officials said the classified program has been constrained by limits on CIA resources, the reluctance of rebel fighters to leave Syria for U.S. instruction and Jordan’s restrictions on the CIA’s paramilitary presence there. But the limited scope also reflects a deeper tension in the Obama administration’s strategy on Syria, one that has sought to advance U.S. interests but avoid being drawn more deeply into a conflict that the United Nations estimates has killed more than 100,000 people since it began in 2011.
http://www.washingtonpost.com/world/national-security/cia-ramping-up-covert-training-program-for-moderate-syrian-rebels/2013/10/02/a0bba084-2af6-11e3-8ade-a1f23cda135e_print.html