Active duty members of the Navy in San Diego were forced to take part in a mandatory 'diversity hike' during which they flew LGBT flags while American flags were nowhere to be seen.

"A woman whose husband is active duty Navy sent me this. His command held a "diversity hike" in honor of Pride Month. Attendance was mandatory. They hiked while waving a rainbow American flag," tweeted Matt Walsh.

As Chris Menahan explains, the event was promoted by the Construction Battalion Maintenance Unit 303, which celebrated "Pride Month" with a "Pride Hike" at Sunset Cliff last week.

The servicemembers were made to carry a version of the LGBT flag which incorporates the stars and stripes, although no actual American flag was flown.

A photo from the hike shows one of the men turning away from the camera, perhaps in protest at being forced to be involved.