What event or condition describes this?

[Furkentine]

Seriously it is like the most basic thing but I can't find it. Would look something like this:

<Conditions>

(Number of units in (Region A) is Equal to 1)

Does anyone know what condition or event this is? Thanks.

 

[ElfWarfare]

its an Integer Comparison condision

 

[Furkentine]

Of course. Integer. Thanks for your trouble.