I felt this article by Andrew Bacevich from this month's Atlantic Monthly would generate some interest given the debate surrounding LTC Yingling's article.

From the article:
In fact, however, empowering groups of soldiers to join in the debate over contentious issues is short-sighted and dangerous. Implicit in the appeal is the suggestion that national-security policies somehow require the consent of those in uniform. Lately, media outlets have reinforced this notion, reporting as newsworthy the results of polls that asked soldiers whether administration plans meet with their approval.

On matters of policy, those who wear the uniform ought to get a vote, but it’s the same one that every other citizen gets—the one exercised on Election Day. To give them more is to sow confusion about the soldier’s proper role, which centers on service and must preclude partisanship. Legitimating soldiers’ lobbies is likely to warp national-security policy and crack open the door to praetorianism.

The Appeal for Redress does not pose an immediate threat to the republic. It’s been signed by only a tiny minority of U.S. soldiers, and the movement could simply peter out, becoming little more than a minor historical curiosity, rather than a harbinger of something larger. Yet in either case, it offers further evidence of advancing constitutional decay.
There's also an interview where Bacevich really fleshes out his thoughts that can be found here.