Allies of Convenience. Multiple

[Stickynote]

I want to build a faction army with 3 Mercenary corps units and 2 Mercenary unit of support rank.

The Allies of Convience keyword says I can take one additional unit of any rank. Will it allow me to take just one unit over the max in one rank (e.g. only able to take 3 corps and not 2 supports simultaneously), or can I take one over the max in multiple ranks at once like described above? 

Thanks.

[TalkPolite]

Hello, 

Its one additional rank only, not one of each rank. 
 

TP