They demonstrated the integration of a Ruggedized IVAS with Future Weapons Sights, Thermal Technology. FWS uses an eMagin Display. Emagin is the only display that incorporates thermal imaging in a Near-Eye-Display

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Once outfitted with the technology, service leaders headed through the woods and into a building on a mission to test out the IVAS HUD's ability to recognise and register faces, pull up maps, and translate foreign characters. Leaders also demoed the integration of the Family of Weapon Sights - Individual (FWS-I) - a thermal sensor mounted on M4 Carbine and M249 Squad Automatic Weapon that provides users with infrared imagery in all weather and lightning conditions - into the IVAS HUD when they faced 'enemy combatants'.

Potential IVAS HUD training applications were also displayed at the event to give army leadership a peek at a few options for incorporating AR. Wearing the IVAS HUD, for example, soldiers can navigate buildings and outdoor terrain littered with virtual combatants, civilians, goats, and even German Shepherds

.https://www.janes.com/article/92593/us-army-leaders-test-out-latest-militarised-hololens-ar-architecture