But if you must, the chareidim would love to send lev l’achim to visit and be mekarev all the wounded soldiers.
Chabad does things Like sending and delivering Latkes to soliders in dangerous areas. Even Chilonim remember things like that and appreciate it.
There are plenty of things that are Mitzvot that could be done and are not Bittul Torah if they are done and the soldiers (and Maybe the general populance) would appreciate them.
If you want to Makarov people, the first step is getting them to know and like you.