[Avodah] Milchemes Mitzvah today

[Micha Berger]

Just to up the ante on the discussion started on Areivim:

Anyone know a heter for Jews living in chu"l to refrain from serving
in Tzahal, or any other army committed to defending Jewish lives? You
have a chiyuv during war time, and it's useless to join once was is
declared. Maybe one could argue that today's army is better off with
fewer and better equipped soldiers than all these volunteers. Also,
volunteers who pose language and cultural issues.

But in a hypothetical where volunteering means a greater likelihood of
more Jews surviving the next war, is there a heter for benei chu"l?

Tir'u baTov!
-Micha