San Juan, Spanish Puerto Rico Included mainly Germany but also the entire Central Powers.
Although the blockade was initially ineffective due to the use of neutral ports in the Soviet Union and Francoist Spain, it grew more severe when the Soviet Union and the United States entered the war in 1941 and when the Germans lost control of their occupied territories in France and Eastern Europe in 1944.
South Lebanon conflict Azerbaijan The Soviet government refused to recognize Lithuania's independence.
After the Houthis overthrew President Abdrabbuh Mansur Hadi the Saudi government accused it of supporting Iran and blockaded the country.
The international community has criticized the blockade for creating a humanitarian crisis in Yemen including famine and a cholera outbreak.