Army Chief of Staff Gen. Mark Milley has rejected a recommendation by an expert panel to trade active-duty infantry forces for aviation capabilities and other purposes. The topic came up at a March 3 House Appropriations defense subcommittee hearing, as members were quizzing Milley and acting Army Secretary Patrick Murphy about their stance on proposals made by the congressionally mandated National Commission on the Future of the Army. The panel, charged with undertaking a broad assessment of Army force structure,...