First Hero killed by non peasantry unit?

[Zakilevo]

I think this is the first time someone actually got killed by a unit led by a human player.

So far four heroes died and three were killed by peasants I believe.

[DeVerci]

Reapers (74) take 456 hits (36 in close combat, 420 from archer fire) (reduced due to fortifications), which cause 10 casualties, making the unit retreat from the battlefield.
Anton Chamberlain, Knight of Saenna has been killed by Crimson Swordsmen (11).

Edit: Found it, this was a while back.

[Indirik]

This was my favorite linee from that battle report:

Arrows in the eye! (2) take 307 hits from archer fire, which cause 11 casualties.
Halvard Janssen, Knight of Taselak has been wounded by Farther Than Yours (54).

[Zakilevo]

Oh right. More than 4 heroes died :o