What does (HA) stand for?

[WWI Flying Ace]

What does the (HA) next to AI squad mates names on the roster in campaign stand for? I’ve been trying to reason it out for a while and can’t seem to come up with a suitable answer. 

Cheers

[Burning Beard]

Historic Ace.  These guys can be shot down but will not die until they actually got shot down/died in real life. 

[WWI Flying Ace]

Thank you!

[+Polovski]

As BB says they are Historical Aces but in effect they are Historical Pilots too, as not all become full aces, but may have had custom aircraft liveries.

 

 

[VFC_Baxter]

I was thinking Hostile Aircraft.

[+Polovski]

Haha  (mmm HA HA)
Although if it meant Hostile Aircraft, having some HA in your own squad could cause a few issues.