Complex sentence: From 14 April 1784 until Christian VII's death in 1808, Christian's son, later Frederick VI, acted as unofficial regent, a regency marked by liberal and agricultural reforms, but also by the beginning disasters of the Napoleonic Wars.
Split into simpler sentences: From 14 April 1784 until Christian VII's death in 1808, it was Christian's son, later Frederick VI, who unofficially acted as regent. This regency was marked by liberal and agricultural reforms, but also by the beginning disasters of the Napoleonic Wars.