The Pennsylvania oil boom began in the mid-19th century, particularly after the discovery of oil at Titusville in 1859. This event marked the start of the modern petroleum industry, leading to rapid economic growth in the region. Many people flocked to Northwestern Pennsylvania in search of jobs and wealth, transforming small towns into bustling centers of activity. As oil production increased, it spurred advancements in technology and infrastructure, including railroads and refineries. The boom also attracted investors and entrepreneurs, contributing to the rise of major companies in the oil industry. This period significantly impacted the local economy and set the stage for future developments in energy production.