The US DOD will host this year's Armed Forces Day
Cross-Band Test on Saturday, May 14 which is a week early.  While Armed Forces Day is
actually on May 21, it is earlier this year so as not to conflict with the Dayton Hamfest.

WAR usually has CW and RTTY capabilities but I do not see any channels dedicated to these modes.
The event use to be quite interesting with all modes being utilized but now it has degraded to mostly voice on USB.

Its kind of tricky finding the correct frequency to transmit on, a good mil op will announce where he is listening but a aux receiver to listen on the ham bands helps to spot the "pack" and you can try to find the correct frequency by listening.

A list of military stations participating can be found at
https://www.dodmars.org/mars-comex-information-website/armed-forces-day

Z