A wireless sensor network is a spatially distributed independent sensor to monitor physical and environmental changes and has lot of applications in battlefield surveillance, disaster rescuing, etc. Target tracking in WSN has great importance in military surveillance. Enhanced energy consumption and node failure rates are the major challenges in target detection. And also, the entry of multiple targets makes the system more complex. In this paper an energy efficient strategy for multiple target

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... detection has introduced, where each target is given a unique ID by the network and the tracking nodes changes its state adaptively. Compared to conventional methods energy consumption is considerably reduced and network lifetime has increased to an extent.