The following are large scale world events that occurred in the History of Tedas. Some are natural (floods, earthquakes, the Great Change) and some are man made (wars, political events, etc.).
Natural Events
The Jeto Dehokal (Great Change)
At the end of the Ko Ganaoth ("Year to Awaken") and shortly after the Great Whisper (see Cha Ti history), there was an event that occurred called the Great Change.
The Great Change is what introduced devefa (magic, manipulation of the world or self) or the hard to explain. Some of the changes that affected each race are as follows.
How this Change occurred varies according to the the race, and more so within the Tedani. AN example is that for the Cha Ti, the Great Whisper spoke to their leader and anointed called individuals for the change. The Great Change did not and does not affect every person of the race with the exception of the Kaindra and the Cyme.
Discovery of the Posil Pejua (Lightning Stone)
Edit notes: this is like the fossil fuel of Tedas, it's a crystal like stone that has a naturally high electrical charge and can be recharged with lightning. There are 3 types: positive charge, negative charged and dual charged. Dual charged are the rarest and most valuable. The positive and negative charged ones are used together to create an electrical spark. The P and N stones can last about 10 years without needing a recharge. Life span is halved each time it's been recharged. Dual charged can last about 200 years. Shaping the stones is done the same way any other rock or hard gem. A stone about the size of a dime could power a small town. Exponential output of energy is based on size. The P and N stone must be the same size or the energy output is inconsistent and can lead to dangerous explosions, etc.
The Great Divide
The Sickness
Non-Natural/Man Made Events
The Fiabi Wars
The Nations War