▁ ▁Eth iop ian ▁Empire ▁– ▁received ▁a ▁German ▁diplom atic ▁mission ▁trying ▁to ▁conv ince ▁it ▁to ▁act ▁against ▁the ▁British ▁in ▁Africa ▁ ▁Lie chten stein ▁– ▁Had ▁a ▁custom s ▁and ▁mon et ary ▁union ▁with ▁Austria - H ung ary . ▁ ▁Luxemb ourg ▁– ▁Never ▁declared ▁war ▁on ▁the ▁Central ▁Pow ers ▁despite ▁being ▁inv aded ▁and ▁occupied ▁by ▁Germany . ▁ ▁Mexico - ▁Dec lined ▁an ▁al liance ▁with ▁Germany ▁( see ▁Z imm ermann ▁Tele gram ). ▁An ▁al ly ▁to ▁the ▁United ▁States ▁by ▁treat y ▁( see ▁ABC ▁countries ). ▁ ▁Netherlands ▁Netherlands ▁– ▁An ▁al ly ▁of ▁the ▁United ▁Kingdom ▁by ▁treat y . ▁Tr aded ▁with ▁both ▁sides . ▁ ▁Norway ▁– ▁G ave ▁naval ▁assistance ▁to ▁the ▁United ▁Kingdom . ▁ ▁Par agu ay ▁ ▁Pers ia ▁– ▁Occ up ied ▁by ▁British ▁and ▁Russian ▁troops . ▁ ▁Spain ▁Spain ▁– ▁Also ▁treat y ▁bound ▁al ly ▁to ▁the ▁United ▁Kingdom . ▁ ▁Sweden ▁during ▁World ▁War ▁I ▁– ▁Fin an cially ▁supported ▁Germany . ▁ ▁Switzerland ▁– ▁Switzerland ▁did ▁declare ▁a ▁" state ▁of ▁sie ge ". ▁ ▁Venezuela ▁– ▁Supp lied ▁the ▁Al lies ▁with ▁oil . ▁ ▁People ▁in ▁World ▁War ▁I ▁ ▁Le aders ▁in ▁World ▁War ▁I ▁▁ ▁Al lied ▁leaders ▁of ▁World ▁War ▁I ▁ ▁Le aders ▁of ▁the ▁Central ▁Pow ers ▁of ▁World ▁War ▁I ▁ ▁Military ▁forces ▁of ▁World ▁War ▁I ▁▁ ▁: Category : World ▁War ▁I ▁flying ▁a ces ▁List ▁of