His record on this is really quite impressive. He got out of Iraq (yes, he was only following George W. Bush's policy and a signed agreement with the Iraqis, but it wouldn't have been the first time a president managed to keep troops where they weren't really wanted). His intervention in Libya was limited and stayed limited. In Mali, Yemen, and other conflicts, he committed to a minimal level of action and stuck with it. And in Afghanistan, he "surged" -- but then de-escalated and appears to be on a path to continue getting out. At no point that I remember did the Obama Administration give in to the kinds of "in for a dime, in for a dollar" arguments that wind up leading to real messes. The administration has consistently been willing to absorb predictable attacks for bugging out too early or for doing too little.
Perhaps Syria will turn out different -- and those who oppose intervention there (or I suppose those who support the current level of intervention but oppose any further action) should obviously be advocating for what they want rather than just trusting Obama. But overall...he hasn't earned anyone's trust on civil liberties or open government, and he's made his share of foreign policy/national security blunders, but he might be the best since Ike at knowing how to keep engagements limited.