Comic Title: Blackhawk #242
Publisher: DC (National Periodical Publications, Inc.)
Address: 575 Lexington Avenue, New York, NY
Cover Date: Aug/Sep 1968
On Sale Date: June 11, 1968 Copyright Date June 11, 1968
Source: Library of Congress, Periodicals 1968

Newsstand Date June 11, 1968
Source: Newsdealer Magazine, V23 #4

Newsstand Date June 11, 1968
Source: Comic Reader, #66

Frequency: Bi-monthly
Cover Price: $0.12
Page Count: 32
Editor: Dick Giordano

Title: "My Brother – My Enemy"
Pages: 23

Feature(s):
Blackhawk (of Earth-1)

Plotter: Marv Wolfman
Scripter: Bob Haney
Artist: Pat Boyette

Feature Character(s)

• Blackhawk (last appearance in Blackhawk #241; next appearance in Blackhawk #243)

Supporting Character(s)

• The Blackhawks (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Andre (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Chuck (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Chop Chop (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Hendrickson (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Olaf (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Stanislaus (last appearance in Blackhawk #241; next appearance in Blackhawk #243)
• Lady Blackhawk (last appearance in Blackhawk #239; next appearance in Blackhawk #243)
• G.E.O.R.G.E. (destroyed in this story; last appearance in Blackhawk #238; no further appearances)

Villain(s)

• Jack Hawk (aka Black Mask; Blackhawk's brother; also appears in flashback; no further appearances)
• Black Mask's gang (no further appearances)
• Several Nazis (in flashback; no further appearances)

Flashback Appearance(s)

• Blackhawk (in the early days of WWII; earliest chronological appearance; next appearance in Blackhawk #198)
• The Blackhawks (in the later days of WWII; last appearance in Blackhawk #239; next appearance in Crisis on Infinite Earths #5)
• Blackhawk (in the later days of WWII; last appearance in Blackhawk #239; next appearance in Crisis on Infinite Earths #5)

Comments:
Part 2:"Fort Fear"
Part 3:"The Return to Blackhawk Island"

This story contains a flashback showing Blackhawk before forming the team and another occurring soon after the team was formed.

Blackhawk's real name is revealed to be Bart Hawk.

Synopsis:
The Blackhawks learn that G.E.O.R.G.E. has been wiped out by a villain known as the Black Mask. Without their special equipment, the Blackhawks are forced to return to their original uniforms and tactics to track down their foe. Blackhawk soon learns that the Black Mask is secretly his brother Jack, whom Blackhawk thought to be long dead.

During the early days of World War II before the Blackhawks were formed, Bart Hawk and his brother were pilots flying a mission against the Nazis. Jack's plane was used as a decoy and shot down. Bart believed his brother dead and left his unit to become Blackhawk. However, Jack survived and was found by the Nazis. His damaged body was molded into a weapon and his mind was turned against his former allies and brother. Before the newly created Black Mask could seek vengeance, the Blackhawks bombed the Nazi camp. The Nazis were killed and Jack fell into a sleep of suspended animation.

Having recently awakened from his long slumber, Jack, now the Black Mask is eager to destroy his brother. The Blackhawks return to Blackhawk Island where Black Mask unleashes the War Wheel against them. The Blackhawks prevail in the fight. Black Mask is able to elude capture following the battle when Blackhawk is unable to fire upon his own brother.