noun
ABCD line
Historical term for the economic embargoes against Japan by America, Britain, China, and the Dutch starting in 1940. Used in discussions of pre-WWII history.
ＡＢＣＤラインは、日本への石油禁輸を含む経済封鎖を指す歴史用語だ。
The ABCD line is a historical term referring to the economic blockade against Japan, including the oil embargo.