National security is a notion by which the homeland & its inhabitant ought to be secured by the government alongside the countries’ parliaments against every kinds of national disasters with different predictions of supremacy like diplomacy, political power, military right, & economic power. The advancement of the theory happened after World War II in the United States. Energy security, environmental security, & economic security is essential for a country to hold national security. National security may be made sure by pursuing the measures as follows: diplomacy may be charged to detach threats & gathering allies; equipped forces which are in effect ought to be maintained; the unemployment & the pliability of acute infrastructure ought to be confirmed; support ought to be obliged or enabled by forming economic power; processes of emergency readiness & civil defense ought to be executed.