In a dramatic turn of events at Camp Pendleton, a military exercise intended to celebrate the U.S. Marine Corps’ 250th anniversary ended with unexpected safety concerns. While the original plan was to conduct a live simulation of a beach assault, including the firing of high explosive rounds from M777 Howitzers, it resulted in a surprising incident involving Interstate 5.
The exercise was meant to be a controlled display, with federal officials promising “all safety precautions in place”. However, California officials voiced concerns about firing live rounds over the busy highway that cuts through the military base.
The situation escalated on Friday when, according to the governor’s office, Marines conducted an unannounced test fire over the freeway, capturing the attention of the California Department of Transportation, which recorded the event.
State Intervention and Unexpected Closure
Governor Gavin Newsom swiftly responded by announcing the closure of a 17-mile segment of Interstate 5 on Saturday, from south of San Clemente to north of Oceanside. This decision coincided with an event attended by approximately 15,000 people, including Vice President JD Vance.
Compounding the situation, a California Highway Patrol (CHP) vehicle was struck by shrapnel when an artillery round exploded prematurely. Although no injuries were reported, this incident has led to a thorough investigation by the Marines.
Events Leading to the Incident
Wednesday
Reports circulated about the White House’s intention to close I-5 for missile launches from Navy ships to Camp Pendleton. In response, Newsom’s press office dismissed the claims as “an absurd show of force.” Despite the Marine Corps’ assurances that no highways would be closed, concerns persisted.
Thursday
The Marine Corps clarified that the demonstration would involve firing M777 Howitzers onto designated ranges, not from Navy ships. These weapons are known for their powerful 155 mm rounds, extensively used in conflicts like Ukraine. Despite assurances, state officials remained vigilant, contemplating freeway closures.
Later, federal directives led to the cancellation of Amtrak and Metrolink services running parallel to the freeway, further alerting state officials.
Friday
State officials observed the Howitzers firing rounds over I-5 during a rehearsal. The Marines maintained that this was a standard practice and posed no safety risk. Nonetheless, late Friday brought heightened concerns as electronic signs warned drivers of “live weapons over freeway,” a change from the planned message.
CHP Chief Tony Coronado expressed alarm, stating that such live-fire exercises over active freeways are rare and emphasized his commitment to public safety.
Saturday
As live-fire activities commenced, the freeway closure led to significant traffic delays, extending travel times by an hour. The White House criticized Newsom’s decision to close the freeway, asserting there were no safety concerns.
During the exercise, an artillery round detonated prematurely, sending shrapnel onto a CHP vehicle. Fortunately, no one was injured, but the incident prompted the Marines to halt further munitions firing.
The Marines, acknowledging the mishap, have launched an investigation to determine the cause of the early detonation and ensure future safety. Capt. Gregory Dreibelbis emphasized the rigorous safety protocols in place and the Marines’ commitment to public safety.
Governor Newsom criticized the exercise as a dangerous show of force, holding President Trump and VP Vance accountable for the risks involved.
The Marines are working to understand the incident’s root cause and apply any lessons learned to prevent future occurrences.
For more details, visit the Los Angeles Times.
