A detailed timeline diagram illustrates important events in history. Timelines are often used in history textbooks and biographies — they explain what happened during a certain period or to a particular person, starting with the earliest event and moving forward through time. As the detailed blackout timeline visually illustrates, India faced a blackout in 2001 caused by a fault in the substation, affecting over 230 million people - losing over $6 million. Another major blackout event happened in 2003 in the United States and Canada, after a generator tripped due to incorrect data from the monitoring system. A similar incident happened in Mexico in 2011 when a transmission line tripped, leading to a blackout, affecting over 2.7 million people.
