armed forces while destroying insurgents, but only by indiscriminately killing civilians as the Ottomans, Italians, and Nazis did in the Balkans, Libya, and Eastern Europe. It can choose to protect civilians along with its own armed forces instead, avoiding so-called collateral damage, but only by abandoning the objective of destroying the insurgents. Finally, a state can discriminate between combatants and non-combatants while killing insurgents, but only by increasing the risks for its own troops, because often insurgents will hide behind civilians, or appear to be civilians. So a country must choose two out of three goals and develop a strategy that can successfully accomplish them while sacrificing the third objective. Zambernardi's theory posits that to protect populations, which is necessary to defeat insurgencies and to physically destroy an insurgency, the counterinsurgent's military forces must be sacrificed, risking the loss of domestic political support. Akali Omeni Another writer who explores a trio of features relevant to understanding counterinsurgency is Akali Omeni. Within the contemporary context, COIN warfare by African militaries tends to be at the margins of the theoretical debate – even though Africa today is faced with a number of deadly insurgencies. In Counter-insurgency in Nigeria, Omeni, a Nigerian academic, discusses the interactions between certain features away from the battlefield, which account for battlefield performance against insurgent warfare. Specifically, Omeni argues that the trio of historical experience, organisational culture (OC) and doctrine, help explain the institution of COIN within militaries and their tendency to reject the innovation and adaptation often necessary to defeat insurgency. These three features, furthermore, influence and can undermine the operational tactics and concepts adopted against insurgents. The COIN challenge, therefore, is not just operational; it also is cultural and institutional before ever it reflects on the battlefield. According to Omeni, institutional isomorphism is a sociological phenomenon that constrains the habits of a military (in this case, the Nigerian military) to the long-established, yet increasingly ineffective, ideology of the offensive in irregular warfare. As Omeni writes, Further, the infantry-centric nature of the Nigerian Army's battalions, traceable all the way back to the Nigerian Civil War back in the 1960s, is reflected in the kinetic nature of the Army's contemporary COIN approach. This approach has failed to defeat Boko Haram in the way many expected. Certainly, therefore, the popular argument today, which holds that the Nigerian Army has struggled in COIN due to capabilities shortcomings, holds some merit.