You must meet these three requirements:

1. Entered active duty for the first time after June 30, 1985.
2. Had military pay reduced by $100 a month for your first 12 months.
3. Served continuously for three years.

   or

   Served continuously for two years if that is what you first enlisted for.

   or

   Served in the 2 by 4 Program—Served active duty continuously for two years and then entered the Selected Reserve within a year of leaving active duty and served four years in the Reserves. 

You must meet these three requirements:

1. Entered active duty before Jan. 1, 1977.
   
2. Served at least one day between Oct. 19, 1984, and June 30, 1985.

   and

   Stayed on active duty through June 30, 1988 (or June 30, 1987, if you entered the Selected Reserve within one year of leaving active duty and then served four years in it).
3. Had entitlement left from the Vietnam-Era GI Bill on Dec. 31, 1989. 

You must meet these three requirements:

1. Not eligible under Category 1 or 2.
2. On active duty on Sept. 30, 1990, and separated involuntarily after Feb. 2, 1991.

   or

   Involuntarily separated on or after Nov. 30, 1993.

   or

   Voluntarily separated under Voluntary Separation Incentive or Special Separation Benefit program 
3. Contributed $1,200 in military pay to the GI Bill before separation. 

You must meet these two requirements:

1. On active duty on Oct. 9, 1996, and had money remaining in a VEAP account on that date, and elected GI Bill by Oct. 9, 1997.

   or

   Entered full-time National Guard duty under title 32, USC, between July 1, 1985, and Nov. 28, 1989, and elected the GI Bill during the period Oct. 9, 1996, through July 8, 1997.
   
2. Had military pay reduced by $100 a month for 12 months.

   or

   Made a $1,200 lump-sum contribution.