You can create side missions by going into the Commander options in the alive menu, then selecting "Tasks" then go to "Autogenerate" tasks. The mission will then assign you specific tasks in line with the overall battle strategy.

when i create auto generate task with rhs opfor there no enemy from rhs opfor .there only takinstan or afgan enemy units/and in task maximum 4-6 enemy unit . can you make more enemy in task?