Also asked on the United interview thread… If my availability changes, how long can I defer a class date?

I haven't received an interview invitation, however, I may need to take a set of orders that will commit me to military service for the next 18-24 months.

Currently a traditional guardsman and flying at a regional. Hoping to get an interview in the next 6-12 months, then transition directly to that job 6-12 months later.