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

<grammar>

air force

<landing_force_noun-sing>

landing force

<battalion_echelon>

task force field train

<atf_noun>

amphibious task force

<force_word>

force

<atf_noun-sing>

amphibious task force

<landing_force_noun>

landing force

<css_section_echelon>

task force field trains cp

<force_word-sing>

force