Both of these points are besides the subject of the article in question. It is focusing exclusively on the CO2 footprint of the US war machine, which is never accounted in the US national emissions (therefore skews any discussion on curbing emissions). (...cumulatively US is by orders of magnitude in energy demands for its military over all others combined (averaged over past 30 years)).
Effects of possible downsizing of US military is yet a separate question with its own multiple levels of analysis.