The biggest factor in how many calories you burn per mile of walking is your weight rather than your speed. According to the research that produced these numbers, at a walking pace speed makes only a minor difference. You will burn more calories by walking more miles.
I believe the Army starts their fiscal year on 1st October and runs until 30 September.
Calendar Year vs. Fiscal Year. A calendar year is always January 1 to December 31. A fiscal year, by contrast, can start and end at any point during the year, as long as it comprises a full twelve months. A company that starts its fiscal year on January 1 and ends it on December 31 operates on a calendar year basis.