BLITZKRIEG - West Germany
DEFENSOR - Argentina
PEREGRINE - France
SHAMROCK - Ireland
TALISMAN - Australian Aborigine
Other existing international characters used -
ARABIAN KNIGHT - Saudi Arabia - The Incredible Hulk #257 (cameo appearance in The Incredible Hulk #250)
BLACK PANTHER - Wakanda - Fantastic Four #52
CAPTAIN BRITAIN - Great Britain - Captain Britain #1 (first U.S. appearance in Marvel Team-Up #65)
COLLECTIVE MAN - China - Uncanny X-Men #539 (cameo appearance in The Incredible Hulk #250)
DARKSTAR - Soviet Union - Champions #7
SABRA - Israel - The Incredible Hulk #256 (cameo appearance in The Incredible Hulk #250)
SASQUATCH - Canada - X-Men #120
SUNFIRE - Japan - X-Men #64
VANGARD - Soviet Union - Iron Man #109
WOLVERINE - Canada - The Incredible Hulk #181 (cameo appearance in The Incredible Hulk #180)
American characters used -
ANGEL - X-Men #1
CAPTAIN AMERICA - Captain America Comics #1
DAREDEVIL - Daredevil #1
INVISIBLE WOMAN - Fantastic Four #1
IRON FIST - Marvel Premiere #15
IRON MAN - Tales of Suspense #39
SHE-HULK - Savage She-Hulk #1
STORM - Giant-Size X-Men #1
THING - Fantastic Four #1
* * * * *
BLITZKRIEG was killed off in Captain America #442
DEFENSOR was killed off in Captain America #442
PEREGRINE is still active
SHAMROCK is retired and is now now a hairdresser and runs a super-hero salon
TALISMAN is still active
I don't know which is worse - having your character killed off with little fanfare by Mark Gruenwald or having them retire to run a "super-hero salon"