The second picture is a Marine Corps embarkation code, it is usually near the right front of vehicles and trailers.
As NDT said, C/C is condition code, this refers to the status of a vehicle in use and changes over time as vehicle types get older. In your case E means that the vehicle would only have limited expense expended on it for maintenance, and only at local level. That means that regardless of current condition (it might have 10 miles on the clock), the vehicle is of a type near the end of its service life and due to be removed from service or storage.
The next is Preservation Code - this refers to how the vehicle is prepared for storage on a ship, in most cases it is Drive On/Off, which means no extra prep was done.
The next is Receipt, which will be the date the current owning unit took that vehicle in stock.
The next line is the NSN (national stock number) for that particular type vehicle.
Next line should read LOC. or LCN which means where that specific vehicle would be on a ship. My Combat Engineer son who drove big trucks says "Only the Squids know what that means"
Somewhere below that will be CARC and a date, that is the last time the vehicle had a complete repaint. If it has WR, that means Water Reducible, as in water based rather than petroleum based paint.
Clear as mud?
Cheers
