If a Romanian division was in defensive, it usually massed its forces along the likely avenues of attack. Gaps between various units were lightly guarded by platoon-size units manning fixed positions, with the main task of delaying the enemy. A "mobile element" was held close by to provide reinforcements if they were needed. Still, by modern standards, the defense lacked depth as most of the division was deployed on the first line and reserves were too small. Some divisions had over 20 battalions, yet the division's reserve was usually made up of a single one, mayby 2 or 3 in some cases. Even worse, sometimes the reserve was not an organic battalion but a collection of smaller, separate units made up of older, poorly trained men. This meant that all too often, frontline troops had to be pulled out of quiet sectors and rushed to the area where they were needed. Trench warfare demanded a thorough study of fortifications and defensive works, an area where the Romanian army was weak. If there was enough time to prepare, three defensive lines were created : the main surveillance line came first, than 150-200 meters further back the main resistence line and finally the support line , 200 to 400 meters back from the main resistence line. All automatic weapons as well as most of the infantry were placed on the main resistence line. Barbe wire was laid out, but not to the extent of the western front. There was neverteless an interesting inovation : numeorous outposts were pushed forward, sometimes up to 4 kilometers in front of the main lines. This had the effect of taking the main forces out of the range of enemy light and medium artillery ( it's interesting to point out that the Germans didn't used outposts, they pushed their infantry forward as much as they could ). As the defense had to be active, counterattacks were very frequent. They usually targeted the flanks of enemy breakthroughs, but sometimes the forces thrown into theses counterattacks were far too small to achieve anything significant results.