Sweden, Ireland, Portugal, Spain, Andorra, Liechtenstein, Switzerland
During World War I, Switzerland, Spain, and the Scandinavian nations remained totally neutral.
Switzerland remained neutral through both world wars.
The United States remained neutral in the beginning of WW2 as they did at the beginning of WW1.
Switzerland
Switzerland and Sweden
No, Sweden was neutral during WWII and remained neutral throughout the war
Sweden remained neutral the entire war.
France
Spain remained neutral
Franco. Spain remained neutral.
Spain, Turkey, and Sweden
The US remained neutral until April 1917