name some of its members ?
The United States and the United Kingdom, to name a few.
NATO
NATO under a policy dubbed "Gaullo-Mitterrandism". Nicolas Sarkozy negotiated the return of France to the integrated military command and the Defence Planning Committee in 2009, the latter being disbanded the following year. France remains the only NATO member outside the Nuclear Planning Group and unlike the United States and the United Kingdom, will not commit its nuclear-armed submarines to the alliance. Few members spend more than two percent of their gross domestic product on defence, with the United States 
the north atlantic treaty organization (nato) is an example UNANSWERABLE what is this organization ? It is an intergovernmental military alliance between 30 North American and European countries.
wiki:25607791
NATO [SEP] Membership
From the mid-1960s to the mid-1990s, France pursued a military strategy of independence from NATO under a policy dubbed "Gaullo-Mitterrandism". Nicolas Sarkozy negotiated the return of France to the integrated military command and the Defence Planning Committee in 2009, the latter being disbanded the following year. France remains the only NATO member outside the Nuclear Planning Group and unlike the United States and the United Kingdom, will not commit its nuclear-armed submarines to the alliance. Few members spend more than two percent of their gross domestic product on defence, with the United States accounting for three quarters of NATO defence spending.