We report here the development of high-efficient Nanoenergetic Gas-Generators (NGG) systems having various potential military applications. We systematically studied micro and nano energetic reactants mixtures such as MoO3-Al, MoO2-Al, WO3-Al, Bi2O3-Al, MnO2-Al, Fe2O3-Al, CuO-Al, some containing boron and carbon additives, to find those generating the highest gas discharge pressure peak. Loose reactant mixtures were loaded (m=0.5 g) into a ceramic boat that was placed inside a cylindrical stainless steel vessel (Parr, V=342 cc) and then ignited. Addition of some boron to the reactant mixture for MoO3/Al and WoO3/Al increased the peak pressure. The maximum combustion temperature during the studied reactions exceeded 2000°C. The thermal front emitted many sparks (hot zones) and small particles. The estimated average rate of temperature rise was ~40,000 C/s. The peak pressure during some nanoenergetic thermite reactions exceeded 1000 psi. Key factors that affect the ignition sensitivity and peak pressure evolution will be discussed.