Early in the 20th century, Colombia had to face devastating consequences from the One Thousand Days War, which lasted from 1899 to 1902, and the loss of Panama. Between 1904 and 1909, the lawfulness of the liberal party was re-established and President Rafael Reyes endeavored to implement a national government. Peace and state reorganization generated the increase of economic activities. Bogotá started deep architectural and urban transformation with significant industrial and artisan production increases. In 1910, the Industrial Exposition of the Century took place at Park of Independence. Stands built evidenced industrial, artisan work, beaux arts, electricity and machinery progress achieved. The period from 1910 to 1930 is designated conservative hegemony. Between 1924 and 1928, hard union struggles began, with oil fields and banana zone workers' strikes, leaving numerous people dead.