I think the red cross sign is because no doubt there will be casualties in civil unrest / martial law. If there was a massive earthquake in the Pacific Northwest, why would the military need equipment to repel civilians?  I would think they would be bringing large trucks carrying in supplies to help the people stranded after a big quake, not fend off civilian attackers.  After a major earthquake, most people are in shock for days afterward, they would welcome any and all help the military could provide. Yes the youtuber clearly said the train was headed for the Pacific Northwest.  Think Oregon Antifa, and Seattle Antifa.  No doubt some equipment will be dropped off at bases near Sacramento too, like Travis Air force base, etc.