The US Marines may ban recruits from respectfully addressing senior members as “sir” or “ma’am” to avoid “misgendering” and offending them.
nypost.com

Marines told to stop using ‘sir,’ ‘ma’am’ to avoid ‘misgendering’ superiors
The Marines might ban recruits from respectfully addressing senior members as “sir” or “ma’am” to avoid “misgendering” and offending them.
