whats the glowing thing on the backpack of these troopers?

[thrilainmanila]

 

[WaLeEdK2]

UV lights for battlefield assesment

 

[FunkyGen]

Halo Rings For Calling Air Drops From The Andromeda Galaxy. I Don't Know About The Make Though, If It's Asarian Or Not... Hmmm...

 

[Khan_patriot]

UV lights for battlefield assesment

Halo Rings For Calling Air Drops From The Andromeda Galaxy. I Don't Know About The Make Though, If It's Asarian Or Not... Hmmm...

It's a a cyalume snap light, it's used during night time exercises so the directing staff/superior officers (who are normally sitting on a vantage point) can know where the soldiers are and what they are doing, different colours might be used to denote different sections/platoons etc depending on the number of soldiers involved. They are placed on the back of the helmets and cammed up to make sure the troops acting as the enemy don't see them approaching. During a real life example UV cyalume are used that are only visible through NVGs.

 

[Qutb-ud-din Aybak]

it's nothing just a bunch of non hanuman soldiers with non hanuman equipment which can be seen so clearly.