DB was founded on January 24, 1969, when Miryung Construction (currently Dongbu Construction) was established with a capital of 25 million won and two employees.
Pioneering and highly successful in the Middle East construction market in the early 1970s, the company contributed to the recovery of the country's oil-shock-stricken economy and invested all of its foreign currency earnings in the country's key industries, including steel, materials, agriculture, logistics, and finance, laying the foundation for the group's growth.
As a result of strategic and planned business integration, DB entered the top 20 groups in 1990 and became a top 10 group in 2000 (according to the Korea Fair Trade Commission in 2000), overcoming the disadvantage of being 30 to 40 years behind the first generation of Korean groups.