Let us posit that the Syrian government did, in fact, order last week’s chemical attack that killed hundreds of Syrian citizens, including women, children and others who had not taken up arms against the Assad regime.

In Washington, the eagerness to initiate military action in order to punish Assad is now palpable. Before ordering any such action, President Obama should answer several questions. He should share those answers with the American people, before not after pulling the trigger.

First, why does this particular heinous act rise to the level of justifying a military response? More specifically, why did a similarly heinous act by the Egyptian army elicit from Washington only the mildest response? Just weeks ago, Egyptian security forces slaughtered hundreds of Egyptians whose “crime” was to protest a military coup that overthrew a legitimately elected president. Why the double standard?

Second, once U.S. military action against Syria begins, when will it end? What is the political objective? Wrapping the Assad regime on the knuckles is unlikely to persuade it to change its ways. That regime is engaged in a fight for survival. So what exactly does the United States intend to achieve and how much is President Obama willing to spend in lives and treasure to get there? War is a risky business. Is the president willing to commit U.S. forces to what could well become another protracted and costly struggle?

Third, what is the legal basis for military action? Neither Russia nor China is likely to agree to an attack on Syria, so authorization by the U.N. Security Council won’t be forthcoming. Will Obama ask Congress for the authority to act? Or will he, as so many of his recent predecessors have done, employ some dodge to circumvent the Constitution? With what justification?

Bacevich last visited Moyers & Company to talk about the changing military mindset in March of this year. Watch video »