evidence: BORDER SECURITY IN AFRICA: AN APPRAISAL OF TERRITORIAL SOVEREIGNTY IN THE CASE OF THE DJIBOUTI AND ERITREA BORDER CRISIS 2008 This study is based on the problem that colonial demarcated undetermined borders of most African territories, still create tension along border regions threatening border security. This paper emphasizes the concept of border security in terms of territorial sovereignty concerns. This paper seeks to analyze what territorial sovereignty implies in the case of the Djibouti and Eritrea border crisis over the territory of Ras Doumeira. Other sub-elements to be analyzed include the extent that territorial boundaries become threatened and treated as a border security issue. The degree at which a breach of physical boundaries invite international reaction. Highlighting the use of spatial analysis this paper contends that the implementation of territorial borders in Africa does not exactly define the position of linear border demarcations, particularly in the case of the Djibouti and Eritrea border crisis. Therefore this paper exerts that the position at which a state exercises political domination over a given space of territory in rival of another state, delineated by a common separated line, determines the extent of the state to call it as its border. It other words the coercion in which a state lays claim to a territory determines the border in the reality of international relations.