In order to test the effects of an incapacitating drug under field conditions a simple exercise was devised The troops were given the same quantity of water to drink before each day's exercise Unknown to the troops, the drug was added to the water on the second day The first effects of the drug make their appearance The men no longer take cover They relax and begin to giggle Losing all contact with reality The troops have lost their air of urgency and many men are laughing Meanwhile, radio communication at the beaches has become difficult If not impossible Men with no specific task in the corps have relaxed with laughter and inconsquential behaviour Though they are still capable of sustained physical effort Seventy minutes after the administration of the drug With one man climbing a tree The troop commander gives up Saying I cannot do anything about this I cannot control the men and I can take no action myself I am wiped out I'm taking pause