green army

Short definition from Wiktionary

Noun

1. 1
   The regular army, not including any special forces.
2. 2
   Name of some armed groups that were not affiliated with the Reds or the Whites, for ideological or other reasons, existing from 1918 approximately until the end of 1924. This name may sometimes include some Anarchist and Nationalist groups, as well as deserters and criminals.