Editing Marion County, Kansas (section)

===20th century===
The [[National Old Trails Road]], also known as the Ocean-to-Ocean Highway, was established in 1912, and was routed through [[Lehigh, Kansas|Lehigh]], [[Hillsboro, Kansas|Hillsboro]], [[Marion, Kansas|Marion]], and [[Lost Springs, Kansas|Lost Springs]]. {{citation needed|date=June 2015}}

Peabody, and nearby [[Watchorn, Kansas|Watchorn]], experienced an [[oil boom]] from 1918 to 1920. The influence of the petroleum industry remained strong in Peabody, and resulted in the greatest change upon the community in the shortest time. More than 100 residences were constructed in October and November 1919. From 1918 to 1919, the population increased by 75% or more, but later decreased as oil booms in other Kansas areas needed the workers. {{citation needed|date=June 2015}}

From 1935 to 1937, the [[Marion County Lake]] was constructed southeast of Marion.<ref>{{Cite web |title=Marion County Park and Lake |url=http://www.marioncountyparkandlake.com/history.html |access-date=August 5, 2022 |website=www.marioncountyparkandlake.com}}</ref> From 1964 to 1968, the [[Marion Reservoir]] was constructed northwest of Marion.<ref>{{Cite web |title=Tulsa District > Locations > Tulsa District Lakes > Kansas > Marion Reservoir > History |url=https://www.swt.usace.army.mil/Locations/Tulsa-District-Lakes/Kansas/Marion-Reservoir/History/ |access-date=August 5, 2022 |website=www.swt.usace.army.mil}}</ref><ref>{{Cite web |title=Marion Reservoir, Kansas |url=https://www.recreation.gov/camping/gateways/565 |access-date=August 5, 2022 |website=Recreation.gov |language=en}}</ref>