Stand up or stand-up in a military sense, is United States

United States

The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 military terminology

Military terminology

Military terminology refers to the terms and language of military organizations and personnel as belonging to a discrete category, as distinguishable by their usage in military doctrine, as they serve to depoliticise, dehumanise, or otherwise abstract discussion about its operations from an actual...

 or jargon

Jargon

Jargon is terminology which is especially defined in relationship to a specific activity, profession, group, or event. The philosophe Condillac observed in 1782 that "Every science requires a special language because every science has its own ideas." As a rationalist member of the Enlightenment he...

 which means to formally activate and commission a unit, formation or command structure. The inverse would be to "stand down" the unit, which means to deactivate or decommission it.

The term can be used in a verb sense, "to stand up," past tense "stood up," but it can also be used as a noun, such as to attend the "stand up" (ceremonies), or to prepare for the "stand up" (process) of a unit. For example:

Examples

• Signal brigade reactivates in Kuwait - Leader Transitions
• Corps to stand up new units Marine Corps News
• Marines to Stand Up Anti-Terror Brigade U.S. Department of Defense
• Afghan Army's Kandahar Regional Command Stands Up U.S. Department of Defense
• New aggressor unit will stand up in Alaska
• Army's first space brigade stands up U.S. Army