Oh, Yim-ha: He became a pilot after graduating from Redwood Flying School.
After staying in China in 1911, he immigrated to San Francisco in 1914. He joined Hung Sa Dahn then. His badge number was 43. He enrolled in the Redwood Aviation School in 1919 and became a pilot in 1920. With a collaboration of Gen. Roh, Baik-lin and rice business tycoon Kim, Jong-lim, he set up Willows Aviation School. He financially assisted the Korean independence movement. In 2014, the South Korean government posthumously recognized him with the Order of Merit of National Foundation / Patriotic People Award for his financial support and contribution for the Korean independence movement.