A tank battalion is going to have N engineering and M recon units attached (values of M and N and specific makeup of said units varies by country and service).

A tank battalion is going to have N engineering and M recon units attached (values of M and N and specific makeup of said units varies by country and service). The point of "inconveniences" like barriers is to a) make the enemy throw an engineering unit at them thereby tipping you off to a probable attack buying you time to mass force there b) just choose to attack somewhere else that is more conveniently defensible for you or where you already have more manpower.