article: List of countries in the 1900s
links: Piauí Kruševo Republic Ecuador Bahia Honduras Rio Grande do Sul Paraíba Amazonas (Brazilian state) Dominion of New Zealand Maranhão Sucre Tonga Bolivia Kingdom of Portugal Nicaragua Rio de Janeiro (state) Qajar dynasty Budapest Greenland Ethiopian Empire La Paz Kingdom of Kongo Mato Grosso Santa Catarina (state) São Paulo (state) Dervish movement (Somali) Pernambuco Espírito Santo Kingdom of Greece Pará Australia Kingdom of Nepal Swaziland Victoria (Australia) Russian Empire Bhutan Alagoas Ceará Brakna Region Principality of Bulgaria Rio Grande do Norte El Salvador First Brazilian Republic Portuguese Angola Andorra Goiás Acre (state) Vienna Ashanti Empire Paraná (state) Kingdom of Bulgaria States of Brazil Sergipe Minas Gerais Onitsha