Carmine Infantino Starts Off in Comics with Cap

I don't think anything earlier has been found: Carmine Infantino hit the ground running in comic books with a handful of stories on a major character, Captain America, in 1943.

From Cap 27, note the face of the French Underground fighter Pierre in panel 1; more to the point, look at him running in panel 6.

Infantino-pencilled stories in Captain America

June/43	27	Blitzkrieg to Berlin
July/	28	The Vultures of Violent Death

I dithered over whether the one-month earlier "Invasion of the Killer Beasts" was by Infantino—it seems so much cruder—but then I found that the Marvel Masterworks reprint credited him as one of the pencillers (others unknown), so I'll go along with that.

in U.S.A. Comics

May/43

8

The Invasion of the Killer Beasts