The man credited with the discovery of Kamchatka, in 1696, was the half-Cossack, half-Yakut adventurer Vladimir Atlasov, who, like most explorers of the time, was out to find new lands to plunder. He established two forts on the Kamchatka River that became bases for the Russian traders who followed.
The native Koryaks, Chukchi and Itelmeni warred with their new self-appointed overlords, but fared badly and their numbers were greatly diminished. Today, the remnants of the Chukchi nation inhabit the isolated northeast of Kamchatka, while the Koryaks live on the west coast of the peninsula with their territorial capital at Palana.
Kamchatka was long regarded as the least hospitable and remote place in the Russian Empire. In the 19th century, the peninsula became a useful base for exploring Alaska. When Alaska was sold off in 1867, Kamchatka might also have been up for grabs if the Americans had shown enough interest.
During the Cold War, Kamchatka was closed to all outsiders (Russians too) and took on a new strategic importance; foreign interest was definitely no longer welcome. It became a base for military airfields and early-warning radar systems, while the coastline sheltered parts of the Soviet Pacific Fleet.