The Red Raven: Golden Age

The Origin of the Red Raven.

1925
On a stormy night in 1925 (15 years before Red Raven Comics #1 in 1940) a clipper plane was making a trans-Atlantic flight carrying Europeans bound for America. Suddenly tragedy struck, lightning caused the pilot to lose control of the ship. In the cabin a mother silently prayed for the life of her toddler. Out of no where an island appeared out of the clouds, floating there as if it were a petrified dirigible. Desperate and confused, the pilot crashed the plane into the sky-isle. All hands were lost, save for one young boy. (first seen in Red Raven Comics #1)

It was on this flying city that the ill-fated plane and it's sole survivor crashed. The bird-men, our of a sense of morbid curiosity, inspected the wreckage left behind by their distant cousins, mankind. The boy was found, and brought before King Aerivar XVIII. While some among the bird-men wanted to kill the young human for fear he may one day destroy them, the king took pity on the young one, and allowed an avian couple to raise him as their own. Because of his flaming-red hair, they named him after their bravest bird: The Red Raven.

1940 On his 21st birthday, some 15 years after he was found as a boy, the Red Raven returned to mankind. Determined to find the inherent good in the race of his birth, he set out into the world to "eradicate the elements that make for unhappiness in their world." Donning an unassuming suit, the Red Raven came to a major metropolis during the Great Depression, he saw food lines and unemployed, bitter men. Finding organized crime to be one of the roots of this problem, he set out to trap the mob-bosses with their own greed. The evil mobster Zeelmo attempted to bribe the Red Raven into working for him, but incorruptible, the Red Raven resisted. Angry, Zeelmo threw the unassuming man into a pit along with a hapless young woman named Andreva that had also offended him. Zeelmo filled the pit with "aging gas" causing the pair to hit middle-age and then senility within a matter of minutes (fortunately, they were able to joke about their dire situation). Undaunted, the Red Raven revealed his true self. He spread his artificial wings, tearing his ill-fitting human clothing. He then freed himself, and Andreva. Once free the effects of the gas wore off, but Zeelmo was hurled into the pit, which the Red Raven then firebombed.

With one mob-boss gone, the Red Raven set out to stop the next in line for Zeelmo's empire, Ratoga. With the help of the Royal Scientist, the Red Raven lured the gold-hungry mobsters into a trap using Avian technology as the bait. Red Raven used that technology to trap Ratoga and his men with their own gold, ready and waiting for the Police. (all this from Red Raven Comics #1, so this probably happened in 1940)

1941-1942
A year later, when the Invaders fell under the mental control of the Red Skull, Bucky called on heroes to come to his side and stop his old friends. The Red Raven heard that call, and became a founding member of the Liberty Legion. (Marvel Premiere #29-30 and Invaders Vol. 1 #5-6, so this probably happend in 1941-1942)

Undetermined time
King Aerivar XVIII died or retired, and the Red Raven was named king (he could have been heir apparent, elected to the thrown, or earned it as Inhumans do - by being the most powerful member of the race).

The (royal?) scientist known as Condor was banished from Sky-Isle.

20-years before the events of Fantastic Four Vol. 1 #1
In the decades that followed WWII the warrior class (possibly the banned "Bloodraven Cult" seen in Defenders vol. 2 #6) tried to rally the bird-men into war against the surface world. Red Raven "destroyed" the warrior class.

However, an android made in the Red Raven's image use "suspended animation gas" to place all of the bird-men, including the Red Raven, into a death-like sleep. The artificial construct separated the military complex from the rest of the continent in the sky and sank it bellow the ocean. (mentioned in X-Men Vol. 1 #44, Sub-Mariner #26, and confirmed as being an android in Defenders Vol. 2 #6)

A few years before the events of Fantastic Four Vol. 1 #1
At some point a computer on Aerie is activated (perhaps automatically) that was programed to create the genetic daughter of the Red Raven using avian genetic samples. She spends her childhood isolated from all other living beings. (mentioned in Marvel Super-Heroes Vol. 2 #8, in the narration she describes her birth and says that she has been observing Sub-Mariner for "14 years," but unless she started observing him at birth, she would have to have been at least a few years old at that point)