Of course, you must fill it out. You officially took part in the work the day you joined the army. You will officially calculate your service years. General companies will ask you to fill in your resume, when and where you worked, mainly to master the work experience and experience of employees.
In addition, if you are admitted to official state units, such as power plants, water plants and government agencies, your military history is your political capital and work experience, and your length of service is calculated from the day you become a soldier.