> Perhaps it's unconstitutional, but there are biological reasons why across all cultures throughout history (as far as I'm aware) men are the ones who are sent to war.

Those conventions predate modern technology. There are obvious reasons why the Roman Legion was entirely male. (In terms of upper body strength, the bell curve for men and women is almost completely disjoint, with the top 10% of women overlapping with the bottom 10% of men.)

Those rationales apply less and less as military technology evolves. There is no obvious reason why fighter pilots should only be men, or Navy gunners, or army helicopter pilots.

> If women want to apply, then fine, but I do worry about a society whos men are willing to send their women to war.

Israel seems fine.