<Ul> <Li> Afghanistan--received a German diplomatic mission trying to convince it to act against the British in India </Li> <Li> Argentina </Li> <Li> Bolivia </Li> <Li> Bhutan </Li> <Li> Chile </Li> <Li> Colombia </Li> <Li> Denmark </Li> <Li> Ecuador </Li> <Li> El Salvador </Li> <Li> Ethiopia (Ethiopian Empire)--Supported Central Powers and was on the verge of entering the war before Iyasu V's dethronement </Li> <Li> Iran--Civil dispute and Allied Campaign against Ottomans </Li> <Li> Liechtenstein--Had a customs and monetary union with Austria - Hungary </Li> <Li> Luxembourg--Never declared war on the Central Powers despite being invaded and occupied by Germany </Li> <Li> Bogd Khaanate of Mongolia </Li> <Li> / Mexico--Declined an alliance with Germany (see Zimmermann Telegram) </Li> <Li> Monaco </Li> <Li> The Netherlands (Dutch Empire) Traded with both sides . </Li> <Li> Norway--Gave naval assistance to the United Kingdom . </Li> <Li> Paraguay </Li> <Li> Peru </Li> <Li> San Marino - 20 volunteers joined on the Italian (Allied) side and it is claimed that San Marino was at war with Austria--Hungary, but it never entered the war </Li> <Li> Spain (Spanish Territories in Africa) </Li> <Li> Spitsbergen--Danish - Norwegian co-dominium </Li> <Li> Sweden--Non-belligerent </Li> <Li> Switzerland--Switzerland did declare a "state of siege" </Li> <Li> Uruguay </Li> <Li> Venezuela </Li> </Ul> <Li> Afghanistan--received a German diplomatic mission trying to convince it to act against the British in India </Li> <Li> Ethiopia (Ethiopian Empire)--Supported Central Powers and was on the verge of entering the war before Iyasu V's dethronement </Li> <Li> Iran--Civil dispute and Allied Campaign against Ottomans </Li>

Which countries were on which side in ww1