Ethereum's official launch date on July 30, 2015 with the release of the Frontier update. On block 200,000, the network upgraded with Frontier Thawing which added the difficulty bomb to the network. The next upgrade to the network was Homestead.
On July 20, 2016, the Ethereum network that was launched with the Frontier release split in an contentious hard fork. The split was label "The DAO Fork" after the third-party application that lead the network to split on philosophical beliefs.
See DAO fork for more information about this hard fork. After DAO fork, Ethereum becomes the side with hard fork on DAO fork event, and Ethereum Classic becomes the side without hard fork on DAO fork event.
Hard forks[edit | edit source]
Below is a tree showing the history of Ethereum hard forks.
|Tangerine Whistle||Gas Reprice|
|Spurious Dragon||Die Hard|
|Muir Glacier||Phoenix (new)||Aztlan|
All currently shown boxes in the tree are hard forks. Dotted lines represent cancelled hard forks. The color is chosen based on the branding logos (Ethereum being blue, and Ethereum Classic being green).