"Flight to Salvation" - "The Veil is Torn" [Campaign 4, Mission 2]

two weeks would bring two additional Thunderbirds.
At the same time, each unit would gain 16 reinforcement warriors. :)

I moved the black dragons and archangels behind the walls, plus the Thunderbirds for cover.
The other units didn't even participate in the battle.

Added 2 minutes later
True, I was running around for about six weeks after the reinforcements appeared.
I visited the upgrade locations, freed the shamans, and bought artifacts.
During that time, the number of reinforcements almost doubled.