History
The origins of the "Walking Mountains" (or "Oriental Giants" as they are referred to in the western world) are unknown. They are an ancient race of giant humanoids that are located in a remote region of the Tibetan mountains. In 1941 they were found by Benson and his assistant Finley who discovered that the creatures' one weakness were loud noises. Enslaving them with threats of death, Benson brought a number of these creatures to the United States.
There he would use the "Oriental Giants" to eliminate his foes and amass ill gotten gains. When Finley became worried about the FBI nabbing them on tax evasion, Benson would have the giants slay him, and the FBI agent that was investigating them. Discovered by government agent Betsy Ross the creatures would attempt to murder her as well until they were stopped by Captain America and Bucky.
Later, Benson would send the creatures to attack Camp Lehigh, however they would be forced back when Bucky managed to kill one of the creatures with a grenade, although Steve and Bucky would not deduce how the creature was killed. Later, Captain America would be captured by the creatures and held prisoner by Benson who would reveal their origins and weakness to the hero before he was freed by Bucky. In the final battle, Captain America and Bucky would set off the cannon that Benson used to keep the giants in line. The resulting explosion would kill the giants, and Benson would also be crushed in the collapse of his hideout. [1]
If any of these giants still exist today remains to be seen.