This paper describes a complete solution of a new abounded wireless sensor network dedicated to intelligence operation. The sensor network (named SEXTANT) presented in this paper is the achievement of four years of research in data fusion and smart sensors development. Two axes have beenstudied: research and development of smart sensors and adapted data fusion algorithms for Multiple Target Tracking (MTT) and classification. The conception of this experimental network has been done by taking into account the constraints to optimize the working life time of the network and satisfy the operational need to build in real time the tactical situation.