You NEED to build pillbox.

A few hours ago, me and a squad of 2/3 people did some flanking with sticky grenades in Scarp of Ambrose, for about ONE HOUR. We killed tanks, a stolen niska, artillery guns... AND THERE WAS NO DEFENSE. On the front, of course, there were pillboxes and guns, but there was no protection from behind, nor from the sides. And even after MANY attacks, similarly, no one built machine guns. Only after more than an hour, they built a few machine guns, but it was still not much. I didn't tell you to build meta pieces, I just say, build watchtowers and pillboxes, it could have stopped us so easily, but no, we were just walking into the enemy base. It wasn't even difficult. This is not a message to taunt or anything, I'm really posting this to help. Building pillboxes doesn't require a lot of resources, experience, or having many people. If they get in the way of a future build, they can easily be destroyed, but in the meantime, they can be essential to stop enemies.

PS sorry for the quality of my English, it's not my native language.