Final answer:
If a soldier reenters the military within 12 months and no medical reason is determined to be the cause, it typically means that the soldier voluntarily left the military and then chose to reenlist.
Step-by-step explanation:
If a soldier reenters the military within 12 months and no medical reason is determined to be the cause, it typically means that the soldier voluntarily left the military and then chose to reenlist. This is commonly referred to as a break in service. Reenlisting within 12 months allows the soldier to keep their previous rank and benefits. However, if the break in service exceeds 12 months, the soldier may be subject to rank reduction and loss of certain benefits.