The rules that use the vocabulary item "unit" are:

<enemy_noun>

enemy unit

<displayable_thing>

unit call sign

unit call signs

<attach_detach_unit_verb>

attach to your superior unit

<attach_detach_unit_verb-report_to>

attach to your superior unit

<attach_detach_unit_command-group_subj_ok>

<attach_detach_unit_verb> unit <other_unit-controlled_unit>

<attach_detach_unit_verb-report_to> unit <other_unit-controlled_unit> <dont_move_mod>

<enemy_noun-mobile>

enemy unit

<css_company_echelon>

unit maintenance collection point

<attach_detach_unit_command>

<accept_unassign_verb> unit <other_unit-controlled_unit>

<attach_detach_unit_verb> unit <other_unit-controlled_unit>

<attach_detach_unit_verb-report_to> unit <other_unit-controlled_unit> <dont_move_mod>

<action_word>

enemy unit

<the_unit>

the unit

unit