| 1400s | Nomadic tribes from Yemen arrive in the area of Western Sahara. |
| 1400-1700s | Spain begins exploratory raids in the area, resident tribes fight them off. |
| Late 1700s | Treaties are signed by the Spaniards and the Moroccans; intensity of fighting diminishes. |
| 1884 | Spain claims the area of Western Sahara as a protectorate. |
| 1900 | 1900 Franco-Spanish Convention defines the southern border of Spain’s Sahrawi colony. |
| 1912 | Spanish-French Convention further defines the borders. |
| 1923-34 | French forces make headway into Morocco and Mauritania; Western Sahrawi tribesmen resist, leading to a deal between France and Spain to stamp out Sahrawi resistance. |
| 1936 | Spain takes full possession of the northern part of the territory. |
| 1950s | Large deposits of high-grade phosphates are discovered in Bucraa. |
| 1956-1958 | Sahrawi resistance fighters continue to battle Spain. |
| 1958 | An agreement between Spain, France, and Morocco results in a weakening of the Sahrawi liberation army. Further agreements put the area of Saguia el Hamra and Rio de Oro under the authority of Spain. |
| 1961 | Western Sahara declared a “Spanish province.” |
| 1963 | The U.N. places Western Sahara on the list of countries to be decolonized by resolution 1514. |
| 1966 | U.N. ratifies the Sahrawi people’s right to self-rule. |
| 1968 | The Sahrawi resistance movement reforms as the Popular Front for the Liberation of Saguia el Hamra and Rio de Oro (POLISARIO Front). |
| 1973 | The POLISARIO Front begins attacks against Spain. |
| 1975 | Spain pulls out of Western Sahara, Moroccan and Mauritanian forces invade, POLISARIO Front forces defend their positions and stage attacks. |
| 1976 | POLISARIO Front declares the Sahrawi Arab Democratic Republic (SADR), which now serves as a government in exile. Thousands of refugees leave Western Sahara. |
| 1982 | Organization of African Unity (OAU) admits SADR as a full-fledged member. |
| 1987 | Construction — which began in 1980 — is completed on the Moroccan wall that protects occupation forces from POLISARIO attack. |
| 1988 | Morocco and POLISARIO Front accept U.N. peace plan. |
| 1991 | A U.N. brokered cease-fire is signed between Western Sahara and Morocco. Morocco sends settlers into the area. |
| 1992 | The U.N.-brokered referendum on statehood is delayed following disputes about who is eligible. |
| 1997 | James A. Baker III is appointed as U.N. Envoy to Western Sahara. |
| 2004 | James Baker resigns as U.N. Envoy in June of 2004. He is replaced by Peruvian diplomat Álvaro de Soto. |
