The article presents the validity of the thought of Carl von Clausewitz, which application, beyond the wars among national States, can be extended to the analysis of the confrontation among political parties or social classes. It defends the political component of the military clashes, and estimates that war, even if denotes polarity and fragmentation, even if is irritated and continuous, continues being fundamentally political. It shows how in the Colombian case the excesses of violence have contributed to eliminate and darkness the political borders, nevertheless which, the politics continues existing in the conflict, though covered with badpolitics. It proposes, taking up again Clausewitz and facing the absence of the State in certain zones of the country, a greater use of the defense as strategy of war.