BUR #86 has been approved by @Eastman.
create implication southern_expeditionary_army_group_(ija) -> imperial_japanese_army
create implication central_china_area_army_(ija) -> imperial_japanese_army
create implication north_china_area_army_(ija) -> imperial_japanese_army
create alias tainan_air_group -> tainan_kokutai
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