A war is an armed conflict between nations, societies or organizations. The effects of war are many, as warring nations often suffer greatly, both financially and in terms of human lives.

The ways in which nations conduct war have evolved throughout history. From the physical fighting of past wars to today’s intelligent warfare, wherein computer technology is used to target enemy organizations or nations, it is evident how warfare evolves along with human achievement.

Presentations and keynotes about war may focus on specific wars, or they may trace the history of war in general,­ revealing how human costs are almost unavoidable although the causes and effects of wars differ greatly.