COLONIAL PERIOD
The following examples can be found using Library of Congress subject heading under Browse Search in Omni.
Belgium Colonies Africa (Omni Advanced Search, Subject contains...)
For specific nations, try searching in Omni, Advanced search, Subject contains ... name of the country and words such as Colonization, Autonomy, or, Nationalism as in the following examples:
For specific nations, try Omni, Browse Search, Library of Congress subject heading and search beginning with the Name of the country followed by History. This will take you to the subject index. Look for the time period or other topical subdivisions about the history of the nation. Another subdivision to try under names of countries is Politics and government. Some examples:
POSTCOLONIAL PERIOD
africa politics and government 1960-
Try subject heading searches beginning with [name of the country] History {time periods for the post independence era]. Also try [name of the country] Politics and government [time period for the post independence era].