The armed half-track

[Huib Versloot]

Strange discussion here:
In play and design, just do "what really happened".
Try to reason from real events to the game not the other way around.

Try to understand that the 6 minutes turn refers to what the manual said units could do in six minutes real time; however a turn is not framed in six minutes.
A turn represents multiple events which do not necessarily take place in the same six minutes, but could well be between 9:00 AM and 11:00 AM for example, or whatever the time is, the designer has decided that the next turn or sequence of events starts.
In such a timespan it is very well possible to build a roadblock, minefield, light bridge etc in real life, in other timespans it might not be. That depends on the actual events the designer wants to represent in his scenario. So nothing holds you back from adding units that can perform tasks that take longer than six minutes. It all depends on "what really happened".

All scenarios work as described above.