The infantry night attack began at 1630 hours on 21 July.

On D+1, the weather was better and the operation began at 2200 hours.

The attack began at 0545 hours and continued for thirteen hours with little or no let up.

Iowa began the action at 0516 hours with her forward 6-pounders.

It began at approximately 2100 hours on the 18th.

Like the traditional watch system, they begin at 2000 hours.

The brigade's mission was to destroy the enemy, and the attack would begin at 0430 hours.

The onset appears to last 20-40 minutes, with peak effects beginning at around 2 hours.

"Your new employment begins at 1800 hours today, here is the address."

The attack began at 073o hours on March ioth 1915.