TEXAS — A U.S. Coast Guard riverine boat crew came under gunfire from the Mexican side of the border last weekend while conducting a joint interdiction operation with Border Patrol agents near Garceno, Texas, along the Rio Grande.

Coast Guard personnel returned fire and suppressed the threat. No injuries or equipment damage were reported, according to Coast Guard spokesperson Lt. Cmdr. Rachel Ault.

In direct response, approximately 500 U.S. Army troops stationed in West Texas were subsequently deployed to the Rio Grande Valley on Friday, October 2, with some units arriving by Chinook helicopter.

U.S. Northern Command says the deployment falls under “Operation Unified Resolve,” part of the broader Joint Task Force–Southern Border mission known as Operation Ardent Vanguard.

Officials say the goal is to “increase patrol capacity, reinforce key areas, provide additional monitoring and detection capabilities, and reinforce security of critical locations” in support of Border Patrol and other federal agents.

The troops are expected to remain in the sector for a minimum of 30 days.

The deployment zone covers roughly 320 river miles and is considered one of the busiest smuggling corridors on the southwest border, making it a priority area for reinforcement after an armed confrontation involving federal personnel.

Not Without Precedent — But Larger in Scale

Cross-border gunfire incidents involving U.S. personnel near the Rio Grande aren’t new, with similar episodes reported in 2014, 2016, and as recently as 2025. What stands out this time is the scale of the military response: a 500-troop reinforcement, delivered in part by helicopter, represents a significantly larger reaction than past incidents drew.

A single exchange of gunfire with no casualties has triggered one of the larger short-term troop surges to the Texas border in recent memory, underscoring how seriously federal authorities are treating direct attacks on U.S. personnel along the river, and the administration’s efforts to curtail illegal migration.