Nui Ba Den, South Vietnam, Oct. 16, 1969: The U.S. flag flies from the top of the radar tower atop Black Virgin Mountain (Nui Ba Den), a solitary block of granite that juts 3,200 feet in the air above Tay Ninh.

The VC has attempted to take back the mountain several times already and few of the 200 members of the outpost doubt that the VC will try to remove the flag from its mast again.

Tomorrow — June 14 — will be a day filled with various birthday festivities, so we wanted to take a moment to remember it will also be Flag Day, which commemorates June 14, 1777, when the Continental Congress determined the composition of the nation’s banner to have red and white stripes and white stars on a blue field (albeit a lot less at the time).

In 1916 President Woodrow Wilson issued a proclamation designating June 14 as Flag Day and in 1949, President Harry S. Truman signed the formal observance into law.