| 1914: |
Part of the 1rd Battleship Squadron at the outbreak of the war. |
| 05-06.03.1916: |
Operations at the Hoofoten. |
| 24.04.1916: |
Covers battlecruiser coastal bombardment of Yarmouth and Lowestoft. |
| 31.05.1916: |
Battle of Jutland: Posen
is not damaged. |
| 18-19.08.1916: |
Unsuccessful North Sea Raid. Torpedoed by British submarine E23
. |
| -04.10.1916: |
Repairs. |
| 18-20.10.1916: |
Unsuccessful North Sea Raid. |
| Spring 1918: |
Posen
takes part in operations to free Finland. |
| 23.04.1918: |
Unsuccessful raid in the northern North Sea at the area of Stavanger. |
| 05.11.1919: |
Decommissioned. |
| 13.05.1920: |
Taken over by Britain as ship G
. |
| -1922: |
Scrapped at Dordrecht. |
