"Lai Līgo Lepna Dziesma" - "May A Proud Song Sway", also known as "Dziesma Brīvai Latvijai" - "A Song For Free Latvia" is a Latvian patriotic song that saw frequent usage during Kārlis Ulmanis' rule (1934-1940).
Composer: Jāzeps Vītols
Text Author: Vilis Plūdons
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https://www.youtube.com/watch?v=Glu6oe0yl1Y