Traysar

Military adversaries and criminal networks worldwide are exploiting the underground domain, using tunnels, mine shafts, pipelines, caves and bunkers to smuggle people and drugs, hide weapons and nuclear infrastructure, move troops undetected, and shelter command centers from strikes. The page catalogs dozens of real-world examples across borders, conflict zones and criminal networks, from Poland-Belarus migrant tunnels to Hamas and Hezbollah tunnel networks to cartel smuggling tunnels at the U.S.-Mexico border. Despite this proliferation of subterranean activity by adversaries, Traysar states that conventional defense forces have not developed comparable underground capabilities. This leaves a gap in the ability to maneuver, sense, strike or defend in tunnels, hardened facilities and other navigable underground infrastructure.

Traysar is developing autonomous underground systems intended to operate in what it calls the Subterra Domain, covering tunnels, bunkers, mines and other subsurface infrastructure. The company describes self-guided platforms built to operate without an operator's direct control, designed for speed of underground movement, mobility with minimal surface support, and distributed infrastructure such as power and communications deployed on the move. It frames its mission around three military objectives: Subterra Advantage (using the underground for maneuver, sensing and strike), Subterra Denial (preventing adversary use of underground terrain), and Subterra Protection (hardening critical infrastructure against underground threats). The site references a product launch, "Terminus," developed with a partner called Armada, though no further technical detail on this product is given.

Traysar argues the underground domain has become an active battlefield now, citing recent incidents through 2026 involving state militaries, militant groups and criminal networks exploiting tunnels and subterranean infrastructure while defense forces have not developed comparable capabilities.