The Djiboutian National Army is the largest branch of the Djibouti Armed Forces. Djibouti maintains a modest military force of approximately 20,470 troops; the army is made of 18,600 troops (IISS 2018). The latter are divided into several regiments and battalions garrisoned in various areas throughout the country. The Army has four military districts (the Tadjourah, Dikhil, Ali-Sabieh and Obock districts). Clashes with the Military of Eritrea, in 2008, demonstrated the superior nature of the Djiboutian forces’ training and skills, but also highlighted the fact that the small military would be unable to counter the larger, if less well-equipped forces of its neighbours. The army has concentrated on mobility in its equipment purchases, suitable for patrol duties and counterattacks but ill-suited for armoured warfare. The 2008 border clashes at least temporarily swelled the ranks of the Djiboutian army, with retired personnel being recalled, but the military's size and capabilities are much reduced since the 1990s. The army to address more effectively its major defense disadvantage: lack of strategic depth. Thus in the early 2000s it looked outward for a model of army organization that would best advance defensive capabilities by restructuring forces into smaller, more mobile units instead of traditional divisions. The official tasks of the armed forces include strengthening the country against external attack, and maintaining border security. Djiboutian troops continue to monitor its borders with Eritrea, in the case of an attack. The Djiboutian Army is one of the small professional advanced armies in East Africa.