A groundbreaking chapter in military tactics was about to unfold in the vast, open skies above the Arizona desert in 1958. Taking place at the US Army Yuma Proving Ground (YPG), a group of eight paratroopers take on a daring (possibly deadly) mission that would redefine aerial insertion techniques and enhance the service’s strategic capabilities on the global stage.

This mission, part of the Army Golden Master Program, centered around the development of what we now know as the High-Altitude, Low-Opening (HALO) techniques—an innovative form of free-falling that enables soldiers to deploy undetected into enemy territory.

The Pioneers and The Birth of HALO

Originally, US Army paratroopers were tethered to their aircraft by a static line, which automatically deployed their parachutes as they exited the platform. However, as military strategies evolved, so did the need for more covert and precise insertion methods.

Enter the HALO jump, which, as its name suggests, involves paratroopers free-falling from high altitudes before opening their chutes close to the ground. This technique minimizes their exposure to enemy detection and increases the surprise element in operations.

The original eight HALO paratroopers, equipped with their expertise in the field and nerves of steel, were selected to test the daring technique several thousand feet off the proving grounds. These pioneers took the immense risk of free-falling in the skies and only deploying their chutes dangerously close to the ground (around 3,000 feet).

Bobbye Williamson, daughter of Sgt. 1st Class Bobby Joe Williamson, one of the first HALO team members, reminisced back in 2022 about the team’s bravery, noting that her father and the rest of the first eight’s dedication were instrumental in mastering the skies with unprecedented precision.

“They were jumping over 20,000 feet with football helmets on and jump boots, or in my dad’s case Converse All Stars because he was six-foot-eight and wore a size 16 shoe, they didn’t make jump boots that big yet,” Williamson recounted.

Testing Limits: Yuma Proving Ground’s Role

YPG’s clear skies and restricted airspace provided an ideal setting for the HALO project.