Green’s Dictionary of Slang

draft n.

[SAmE draft, the selecting of a smaller group from a larger body, usu. in milit. context]

(US Und.) the transportation of a convict from one prison to another.

[US]Goldin et al. DAUL 61/2: Draft, n. (P) A transfer of inmates from one prison to another. [...] Draft, v. (P) To include an inmate in a draft.