Military electronic deception refers to the use of electronic equipment to disguise or falsely simulate relevant information of the enemy, deceive the enemy's electronic reconnaissance, and cause the enemy to make false judgments on its own deployment, combat capabilities, and combat attempts, etc. Disrupt the enemy's purpose. According to the above definition, which of the following is involved in scams? ['During the military exercise, the Blue Army deliberately lost the fake electronic combat map and pretended to leak its own information.', 'A country hid a drone in the airspace of an enemy country, pretended to be a leader of the enemy country, issued a false order.', 'In WWII, the Allied Forces set up a command, using communication equipment to continuously send various "command orders".', 'A department based in the Pacific Islands has set up a large number of simulation databases for its computer systems.']