Final answer:
Advancement to E-4 through E-9 in the military is based on a combination of standards, skills, experiences, and education for E-4 through E-6.
Step-by-step explanation:
Advancement to E-4 through E-9 in the military is based on a combination of standards, skills, experiences and education for E-4 through E-6.
In the military, individuals are promoted based on their performance, time in service, completion of required training, and demonstration of leadership abilities. For example, to advance to E-4, also known as a Corporal or Specialist, a soldier typically needs to meet certain time-in-service requirements, have completed the required training, and demonstrate proficiency in their job. The same applies for higher ranks from E-5 to E-9.
It is important to note that promotion requirements may vary slightly between different branches of the military, but the general principle of a combination of standards, skills, education, and experience remains consistent.