“Military Wives” (*1/2 out of four) was a vapid comedy based on the true story of a group of army wives (Kristin Scott Thomas, Sharon Horgan, Emma Lowndes, and others) whose husbands went away to serve in Afghanistan and they formed a musical choir and found themselves starting up a media sensation and musical movement. Strictly for anyone who couldn’t get enough of any of the “Pitch Perfect” movies which this movie rips off often but not even the musical numbers here are particularly good or well-staged. Woefully overlong also at nearly two hours. A disappointment from director Peter Cattaneo who in 1997 directed the far more buoyant and engaging “The Full Monty.”