There is more extrapolation about these vehicles than truth
If you google the images you will find they all lead back to a contractor who builds, paints and refits vehicles under contract. There is a tight timeline for somewhere so they are being sent to ports which can handle roll on, roll off ships like Houston tx, Norfolk va etc. This happens every few years and generally scatters the online roaches for a few weeks, but its mostly just an amusing undertone on prepping boards
About the helmets- OSHA requirements Hard hats not helmets- when operating heavy vehicles inside the US. Govt contractors and Stevedore working at Ports are required to wear hard hats- Not UN helmets
Look at the limited number of colors available in hardhats and safety blue looks a lot like UN blue to an idiot trying to generate conspiracy
Follow the money here, who the sites belong too, who sponsers them and how it benefits them to generate traffic
trump leading has sent many of the conspiracy sites traffic dropping a lot this year as people think for themselves.
Sites like Becks and Levins need the traffic to remain a float