Early in the new 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 liberal party legality was reestablished and President Rafael Reyes endeavored to implement a national government. Peace and State reorganization generated economic activities increase. Bogotá started deep architectural and urban transformation with significant industrial and artisan production increase. 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 struggle began with oil fields and banana zone workers strikes, leaving numerous people killed.