Frederick the Great was not the first battlefield commander to put more forces on one side of his battle lines. But in the past the maneuver had to be done at night or out of sight of the enemy. If a commander put more troops on one flank (or "wing"), the opposing commander seeing this, would simply move his forces to counter the move. Shifting forces during a battle took time. There was also the risk of the enemy attacking while forces were being moved around. Frederick overcame these problems. The most important thing he did was train his soldiers to march quickly. When his Prussian army reached the battlefield, they would form the standard (for the time) two lines parallel to the enemy's two lines. But Frederick's army had been trained to "quarter-wheel" (turn at an angle) by sections, then in a fluid movement, quickly form into columns. Each unit of the Prussian army did this at the same moment which allowed his entire force to perform such a movement in under two minutes.