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v t e

v t e Army units and organization
Subordinated element	Fireteam / Crew Ø Squad ● Section / Patrol ●● Platoon / Troop / Flight ●●● Staffel / Echelon ●●●●
Unit	Company / Battery / Squadron ❘ Battalion / Squadron / Cohort ❘ ❘ Regiment / Group ❘ ❘ ❘
Formation	Brigade / Group / Wing ☓ Division / Legion ☓☓ Corps ☓☓☓
Command	Field army / Command ☓☓☓☓ Army group / Front ☓☓☓☓☓ Region / Theater ☓☓☓☓☓☓
Temporary	Detachment Chalk Patrol Field force Task force Brigade group Flying column Combat command Regimental combat team Battalion tactical group Battlegroup Group army Combat team

In warfare, a theater or theatre is an area in which important military events occur or are in progress.^[1]^[2] A theater can include the entirety of the airspace, land, and sea area that is—or that may potentially become—involved in war operations.^[3]

^ "Definition of theatre noun (MILITARY) from Cambridge Dictionary Online: Free English Dictionary and Thesaurus". Dictionary.cambridge.org. Retrieved 2011-08-31.
^ "Theater (warfare) – definition of Theater (warfare) by the Free Online Dictionary, Thesaurus and Encyclopedia". Thefreedictionary.com. Retrieved 2011-08-31.
^ "theatre of war, theatres of war- WordWeb dictionary definition". www.wordwebonline.com.