is it a coincidence that all call of duty odd numbers have veichles or was it ment to be that way?

Question

call of duty 1
call of duty 3
both have vehcles
call of duty 2
call of duty 4
dont
concinende or on purpose????????
????

im talking about multiplayer

Answer 1

CoD 3 wasn't made by Infinity Ward who made 1, 2, and 4 so thats probably why there were veichles in that one.

And 4 sorta does, theres the level where your the gunner of a AC-130 gunboat and a machine gun in a chopper