Nothing wrong with being prepared, but beware that by implication, you are attempting to predict, as concerns, not IF you will fight, but WHERE and against WHOM, you will fight.

I watched the British Army guess wrong on, going for Chinese and Spanish in 1989, to needing Arabic in 91, then needing Serbo-Croat from 1992-98 , then no competent speakers of any indigenous West African language for Sierra Leone (bar 1 x Nigerian officer Cadet), then back to Arabic in 2003.

.... and I even spent 2 months learning to read Russian Maps, and transliterate cyrillic ....!