From Desert Operations Wiki
In addition to the Research from the Units and the construction of the Buildings the attack can be a easy way to obtain buildings fast.This can win buildings when attacking or winning a defense attack. (Here is an example: Attacker loses 35% of the attack value with the units, the opponent has a 52% value for the defense of the units destroyed -> the attacker will win the attack. If you win a battle you can receive up to 33% of the opponents buildings. Warning! this is not the same when it comes to the unit amounts. You must multiply it with the appropriate value for the defense or attack losses.
After an attack the values are set to these percentage for the maximum that can be gained for the win: 33%, 28%, 14%, 7% and 3%. After 12h the percentage will increase one level.
The attacks must be five minutes apart. If you launch more than 5 attacks on a players you will not receive any buildings and and will just waste resources. It is not allowed to send these attacks out on purpose in the interest of gaining battle points.
You can only attack a player that has 67% and maximum of 150% of your points. Their names will be shown in white in the rank list and island view.
You can be attacked after 20.000 points or you attack some else first. Attacking and managing you units takes place on the base in the > Command Center > Military.