The old reliance on extensive artillery preparation, followed by air strikes, was out.
The attack, planned at the last moment, lacked adequate artillery preparation.
The artillery preparation started on 17 October, four months late.
At once the French saw the opportunity for a flank attack, this time with artillery preparation.
The assault began on the 22 May after a massive artillery preparation.
After an artillery preparation, the attack from the south began, and met with initial success.
Despite the heavy artillery preparation and night approach, the attack failed.
These attacks were carried out without previous artillery preparation and in each case the enemy was completely surprised.
After 30 minutes of artillery preparation, the assault began at mid-morning on 6 May.
Its chief use is as a kind of artillery preparation for attacks on chastity.