As nouns the difference between militia and reservist
is that militia is (in particular) an army of trained civilians, which may be an official reserve army, called upon in time of need, the entire able-bodied population of a state which may also be called upon or a private force not under government control while reservist is a soldier who is assigned as reserved; after training, no longer in full active duty.
militia
English
Noun
(
en noun)
(in particular) An army of trained civilians, which may be an official reserve army, called upon in time of need, the entire able-bodied population of a state which may also be called upon or a private force not under government control.
The national police force of certain countries (e.g. Ukraine).
reservist
English
Noun
(
en noun)
A soldier who is assigned as reserved; after training, no longer in full active duty.
Synonyms
* weekend warrior