From Heroes of Might and Magic I to V!

Here, the Ironfists left their native Enroth, and who did they leave Humphrey with? A mere boy... and that's how they paid the price...
There was probably complete chaos happening in Enroth at that time.

So, Archibald teleports many miles away...
Or his Angels saved him (and in the process of saving him, he hit his head and developed amnesia)... he's sitting somewhere on Axoth, completely bewildered, thinking, "Where am I? Who am I?"