https://www.va.gov/vetsinworkplace/docs/em_activereserve.html
Active Duty vs. Reserve or National Guard
What is the difference between someone who is active duty military and someone who is in the Reserve or National Guard?
A person who is active duty is in the military full time. They work for the military full time, may live on a military base, and can be deployed at any time. Persons in the Reserve or National Guard are not full-time active duty military personnel, although they can be deployed at any time should the need arise.
https://myfuture.com/military/types-of-military-service
Active Duty means that service members’ jobs are full time, whether they are deployed overseas or domestically. These service members receive a regular paycheck and full benefits, including health care, a housing allowance and 30 days of paid vacation per year.
https://comptroller.defense.gov/Portals/45/documents/fmr/archive/07aarch/07a_definitions_Feb99.pdf
4. Active Duty. Full-time duty in the active service of a Uniformed Service, including fulltime training duty, annual training duty, full-time National Guard duty, and attendance, while in the active service, at a school designated as a Military Service school by law or by the Secretary concerned.
But I am glad that I inspired you to look up terms which I have been familiar with for years but which somehow you apparently have just now discovered.
“During the 1990–1991 Gulf War, Graham was recalled to active duty, serving as a judge advocate at McEntire Air National Guard Station in Eastover, South Carolina, where he helped brief departing pilots on the laws of war. In 1998, the Capitol Hill daily newspaper The Hill contended that Graham was describing himself on his website as an Operation Desert Shield and Desert Storm veteran. Graham responded: “I have not told anybody I'm a combatant. I'm not a war hero, and never said I was. ... If I have lied about my military record, I'm not fit to serve in Congress”, further noting that he “never deployed”.”
https://www.nytimes.com/2015/08/04/opinion/lindsey-grahams-curious-military-career.html
You imagined that I misused the term and have scolded me multiple times. You seem to have a real problem staying focused.