មានគោលបំណង៣ សម្រាប់ការក្លែងភេទ គឺ (១) បញ្ឆោតខ្មាំង ខុសទីតាំង (២) ធ្វើឲ្យខ្មាំងខាតបង់ធនធាន និង (៣) ធ្វើឲ្យខ្មាំងភ្ញាក់ផ្អើលស្មានមិនដល់ ទោះជាដឹងក៍ហួសពេល។
- There are three basic types of deception. The first type attempts to cause the enemy to focus his attention on the wrong place. The Allies used this type of deception to convince the Germans that the Normandy invasion would really take place at Pas de Calais.
- The second type tries to make the enemy waste his resources (time, ammunition, weapons, manpower, fuel) in unimportant directions or on dummy targets. During the Battle of Britain, the British set up phony targets and interfered with the German's navigational aids causing therm to attack non-existent airfields and factories.
- The third type of deception is used to surprise the opponent and catch him unprepared for action. (8,124-125) Surprising the enemy has always been regarded as an integral part of the art of war.(25,92) According to the military strategist Carl von Clausewitz, "Surprise is more or less at the bottom of all military enterprises." Surprise is the "product of speed and secrecy." The enemy must not learn your real intentions until it is too late to react effectively. (17,100)
- Surprise In Surprise Attack: Lessons for Defense Planning Richard K. Betts studied the element of surprise in combat operations and concluded: