subclass_of patrol
An ___MASK7___ ( from ___MASK23___ " arma " " arms , weapons " ___MASK10___ Old French " armée ", " armed " ( feminine )) or ground force is a fighting force that fights primarily on land . In the broadest sense , it is the land - based ___MASK80___ branch , service branch or armed service of a nation or state . It may also include other branches of the ___MASK80___ such as the air force ___MASK10___ means of aviation corps . Within a national ___MASK80___ force , the word ___MASK7___ may also mean a field ___MASK7___ . They differ from ___MASK7___ reserves who are activated only during such times as war or ___MASK52___ disasters . ___MASK32___ are members of the ___MASK51___ . Usually , personnel are divided into ___MASK80___ branches roughly defined by certain circumstances of their deployment . Those who serve in a typical large land force are soldiers , making up an army . Those who serve in seagoing forces are seamen or sailors , and their branch is a navy or coast guard . Marines serve in a marine corps . In the 20th century , the development of powered ___MASK63___ aircraft prompted the development of air forces , serviced by airmen . Designated leaders of ___MASK80___ personnel are officers . These include commissioned officers , warrant officers and non - commissioned officers ( NCOs ). For naval forces , non - commissioned officers are referred to as petty officers ( POs ). ___MASK80___ personnel are instructed to wear dog tags A warrant ___MASK4___ ( WO ) is an ___MASK4___ in a ___MASK80___ organisation who is designated an ___MASK4___ by a warrant , as distinguished from a commissioned ___MASK4___ who is designated an ___MASK4___ by a commission , and a non - commissioned ___MASK4___ who is designated an ___MASK4___ , often by virtue of seniority . A non - commissioned ___MASK4___ or noncommissioned ___MASK4___ ( NCO , colloquially non - com or noncom ) is a ___MASK80___ ___MASK4___ who has not earned a commission . Such is also called sub - ___MASK4___ in some countries . Non - commissioned officers , in the English - speaking world , usually obtain their position of authority by promotion through the enlisted ranks . In contrast , commissioned officers hold higher ranks than NCOs , have more legal responsibilities , are paid more , and often have more non - ___MASK80___ training such as a university diploma . Commissioned officers usually earn their commissions without having risen through the enlisted ranks . " Mustang " is a slang term in the United States ___MASK51___ used to refer to a commissioned ___MASK4___ who began his or her career as an enlisted service member . A patrol is commonly a group of personnel , such as ___MASK17___ enforcement officers or ___MASK32___ , that are assigned to monitor a specific geographic area . This is also often referred to as a beat . A ___MASK97___ guard , ___MASK97___ officer , or protective agent is a private person who is paid to protect an organization ' s assets ( property , people , money , etc .) from a variety of hazards ( such as waste , damaged property , unsafe worker behaviour , criminal ___MASK53___ , etc .) by utilizing preventative measures . They do this by maintaining a high - visibility presence to deter illegal and inappropriate actions , observing ( either directly , through patrols , or by watching alarm systems or video cameras ) for signs of crime , fire or disorder ; then taking action to minimize damage ( example : warning and escorting trespassers off property ) and reporting any incidents to their client and emergency services as appropriate . Their international ( at least in the United States of America and Canada ) symbol of brotherhood is The Thin Green Line . Security officers are generally uniformed to represent their lawful authority on private property . A ___MASK17___ enforcement ___MASK4___ ( LEO ) or peace ___MASK4___ , in North American English , is a public - sector employee whose duties primarily involve the enforcement of laws . The phrase can include police officers , municipal ___MASK17___ enforcement officers , special police officers , customs officers , state troopers , special agents , special investigators , border patrol officers , immigration officers , court officers , probation officers , parole officers , arson investigators , auxiliary officers , game wardens , sheriffs , corrections , marshals , and deputies . ___MASK97___ guards are civilians and therefore not ___MASK17___ enforcement officers , unless they have been granted powers to enforce particular laws , such as those accredited under a Community Safety Accreditation Scheme . Although typically the term " ___MASK17___ enforcement ___MASK4___ " refers to those government agents with police powers , prosecutors are also ___MASK17___ enforcement officers . The ___MASK51___ of a ___MASK46___ are its ___MASK68___ - sponsored defense , fighting forces , and organizations . They exist to further the foreign and domestic policies of their governing body and to defend that body and the nation it represents from external and internal aggressors . In broad usage , the terms " ___MASK51___ " and " military " are often treated synonymously , although in technical usage a distinction is sometimes made in which a ___MASK46___ ' s ___MASK51___ may include both its military and other paramilitary forces . Armed force is the use of ___MASK51___ to achieve political objectives . The study of the use of ___MASK51___ is called ___MASK45___ . Broadly speaking , this involves considering offense and defense at three " levels ": strategy , operational art , and tactics . All three levels study the application of the use of force in order to achieve a desired objective . A ___MASK78___ or maritime ___MASK24___ is a fleet of waterborne ___MASK80___ vessels ( watercraft ) and its associated ___MASK96___ , both sea - based and land - based . It is the branch of a nation ' s armed forces principally designated for naval and amphibious warfare ; namely , lake - borne , riverine , littoral , or ocean - borne combat operations and related functions . It includes anything conducted by surface ships , amphibious ships , submarines , and seaborne aviation , as well as ancillary support , communications , training , and other fields ; recent developments have included space - related operations . The strategic offensive role of a ___MASK78___ is projection of ___MASK24___ into areas beyond a country ' s shores ( for example , to protect sea - lanes , ferry troops , or attack other navies , ports , or shore installations ). The strategic defensive purpose of a ___MASK78___ is to frustrate seaborne projection - of - ___MASK24___ by enemies . The strategic task of the ___MASK78___ also may incorporate nuclear deterrence by use of Submarine - launched ballistic missiles . Naval operations can be broadly divided between riverine and littoral applications ( brown - water ___MASK78___ ), open - ocean applications ( blue - water ___MASK78___ ), and something in between ( green - water ___MASK78___ ), although these distinctions are more about strategic scope than tactical or operational division . A ___MASK89___ guard or coastguard is a maritime ___MASK97___ organization of a particular country . The term implies widely different responsibilities in different countries , from being a heavily armed military force with customs and ___MASK97___ duties to being a volunteer organization tasked with search and rescue functions and lacking any law enforcement powers . However , a typical ___MASK89___ guard ' s functions are distinct from typical functions of both the " navy " ( a pure military force ) and a " transportation police " ( a civilian law enforcement agency ). A ___MASK2___ is one who fights as part of an organised , land - based armed force . A ___MASK2___ can be an enlisted person , a non - commissioned officer , or an officer . A petty ___MASK4___ ( PO ) is a non - commissioned ___MASK4___ in many navies and is given the NATO rank denotion OR - 6 . They are equal in rank to sergeant in the British Army and Royal Air Force . A petty ___MASK4___ is superior in rank to leading rate and subordinate to chief petty ___MASK4___ , in the case of the British ___MASK51___ .