North - Strategic
North - Nationalism (Egypt)
North - Nationalism (Sudan)
North - Economic Factors
North - Imperial Rivalry (Egypt)
North - Imperial Rivalry (Sudan)
East - Economic Factors
East - Imperial Rivalry
East - M.O.T.S (MacKinnon)
East - M.O.T.S (Peters)
East - M.O.T.S (Cpt. Lugard)
West - Economic Factors
West - Nationalism
West - Imperial Rivalry
West - M.O.T.S
South - Economic Factors
South - Strategic
South - Nationalism
South - Imperial Rivalries
South - M.O.T.S
Expansion was by treaties/agreements
Expansion was by military conflict
Expansion was by combination of financial/diplomatic agreement and military action