| 1906: |
After training and trials the ship is attached to the reconnaissance forces. |
| 1911: |
Decommissioned. |
| 02.08.1914: |
At the outbreak of the war, the armored cruiser is attached to the 3rd Reconnaissance Squadron. |
| 26-27.08.1914: |
Operations in the Eastern Baltic Sea to assist the grounded CL Magdeburg
. |
| -Spring 1915: |
Used to protect the Baltic Sea entrance. |
| Summer 1915: |
Roon
took part in several Operations in the Baltic Sea: The attack on Libau, several mine operations and the invasion of the baltic islands. |
| 04.12.1916: |
Put out of active service due to of bad material conditions. The ship is used as a torpedo test ship and training ship for cadets. |
| 1918: |
Conversion into seaplane carrier is stopped at the end of the war. |
| 25.11.1920: |
Stricken from fleet lists. |
| 1921: |
Broken down in Kiel. |
