The rules that use the category "<engagement_loc_mod-gapsout_null-gapsin_null>" are:

<suppress_by_fire_command-gapsout_null-gapsin_null>

<basic_suppress_by_fire_command-gapsout_null-gapsin_null> <engagement_loc_mod-gapsout_null-gapsin_null>

<attack_by_fire_command-gapsout_null-gapsin_null>

<basic_attack_by_fire_command-gapsout_null-gapsin_null> <engagement_loc_mod-gapsout_null-gapsin_null>

<set_up_verb> <base_of_fire_phrase> <engagement_loc_mod-gapsout_null-gapsin_null> and <attack_by_fire_verb> <enemy_loc-gapsout_null-gapsin_null>

<set_up_verb> <base_of_fire_phrase> <engagement_loc_mod-gapsout_null-gapsin_null> and <engage_verb> <enemy_loc-gapsout_null-gapsin_null>

<enemy_loc-gapsout_null-gapsin_null-mobile>

<enemy_phrase-mobile> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-num_null>

<unit_n-num_null> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-not_det-sing>

<unit_n-not_det-sing> <engagement_loc_mod-gapsout_null-gapsin_null>

<attack_by_fire_command-gapsout_null-gapsin_np_gap>

<basic_attack_by_fire_command-gapsout_null-gapsin_np_gap> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-not_det-pl>

<unit_n-not_det-pl> <engagement_loc_mod-gapsout_null-gapsin_null>

<hasty_occupy_command>

<hasty_occupy_verb> <defensive_position_phrase> <engagement_loc_mod-gapsout_null-gapsin_null>

<hasty_occupy_verb> <defensive_position_phrase> <engagement_loc_mod-gapsout_null-gapsin_null> <bearing_mod-gapsout_null-gapsin_null>

<unit_nom>

<unit_n> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-pl>

<unit_n-pl> <engagement_loc_mod-gapsout_null-gapsin_null>

<enemy_loc-gapsout_np_gap-gapsin_np_gap>

<enemy_phrase> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-sing>

<unit_n-sing> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-not_det-num_all>

<unit_n-not_det-num_all> <engagement_loc_mod-gapsout_null-gapsin_null>

<unit_nom-num_all>

<unit_n-num_all> <engagement_loc_mod-gapsout_null-gapsin_null>

<enemy_loc-gapsout_null-gapsin_null>

<enemy_phrase> <engagement_loc_mod-gapsout_null-gapsin_null>

<establish_base_of_fire_command-gapsout_null-gapsin_null>

<set_up_verb> <base_of_fire_phrase> <engagement_loc_mod-gapsout_null-gapsin_null>

<set_up_verb> <base_of_fire_phrase> <engagement_loc_mod-gapsout_null-gapsin_null> <open_fire_verb> <on_order>

<set_up_verb> <base_of_fire_phrase> <engagement_loc_mod-gapsout_null-gapsin_null> targeting <on_prep> <enemy_loc-gapsout_null-gapsin_null>