The rules that use the category "<enemy_loc>" are:

<assault_command>

<assault_verb> <enemy_loc>

<suppressive_fire_command>

<suppressive_fire_verb> <enemy_loc>

<establish_base_of_fire_command>

<set_up_verb> <base_of_fire_phrase> <location_prep> <engagement_loc> targeting <on_prep> <enemy_loc>

<suppress_by_fire_command>

<movement_verb> <to_prep> <engagement_loc> and <suppress_by_fire_verb> <enemy_loc> <by_fire_phrase>

<basic_suppress_by_fire_command>

<suppress_by_fire_verb> <enemy_loc> <by_fire_phrase>

<attack_by_fire_command>

<movement_verb> <to_prep> <engagement_loc> and <engage_verb> <enemy_loc> <by_fire_phrase>

<movement_verb> <to_prep> <engagement_loc> and <plain_attack_by_fire_verb> <enemy_loc> <by_fire_phrase>

<set_up_verb> <base_of_fire_phrase> <location_prep> <engagement_loc> and <attack_by_fire_verb> <enemy_loc>

<set_up_verb> <base_of_fire_phrase> <location_prep> <engagement_loc> and <engage_verb> <enemy_loc>

<basic_attack_by_fire_command>

<engage_verb> <enemy_loc> <by_fire_phrase>

<plain_attack_by_fire_verb> <enemy_loc> <by_fire_phrase>

<open_fire_command_1>

<open_fire_verb> <on_prep> <enemy_loc>