The U.S. Army and the British Army are undergoing similar processes of rebalancing between regular and reserve personnel. The British armed forces are currently at a more advanced stage of this change than the United States, and consequently there are useful lessons to be drawn from their experience to date. This is particularly the case in a time of growing defense austerity; in addition to their smaller scale, the United Kingdom's (UK) armed forces have great familiarity with undertaking missions and maintaining close to full-spectrum capability while subject to severe and apparently insurmountable resource constraints. Studying how this is made possible may also provide valuable pointers for a U.S. defense force in an era of sequestration and budget cuts.