to zalman, you probably have littel respct for me. THis is OK. i can live without it. Interestingly, I have quite a lot of respect for you and your research/knowledge. It is not always correct but, at least, you seem to know most of the background. For that, I do respect you.
As far as the issue of war and women. I checked and there is no such RADVAZ,At least not on the relevant rambam in hilchos melochim.
Your “rayoh” from the Rambam – sefer Hamitzvos- actually SUPPORTS the contention that women (and kallohs-“afilu kallah mechuposso”) go out to WAR in times of milchemet mitzvos. As you quote: OPTIONAL WARS” OPTIONAL WARS.
I have to check the Sefer Hachinuch but a milchemet mitzvah is clearly NOT a mitzvas ashei shehazman geromo.
I congratulate you that you did find the ONE acharon who seems to change the simple meaning of the mishnah. The Reshash (R’Shmuel Stresson mevilna) indeed writes that. But, as you quoted, his original understanding was that women do go to war in such case-and he writes, “this is a chidush”. He then writes “ulai” MAYBE, this is to prepare the meals,etc. I did not find any rishon or acharon who holds that view.
Lastly, you did not comment on the “Perisha” on talmud torah to women..Look it up..