What is the definition of the word waging

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

General rochambeau general washington by

Prior to the presence of europeans on the continent, the slave trade in africa a) did not exist in any form. b) was limited to internal trade only. c) included the trans-saharan and indian ocean slave trade. d) was rarely needed due to the lack of an agricultural economy.