| 20.08.1915: | Frankfurt
 is commissioned. | 
| - 12.10.1915: | Training and trials, attached to the II Reconnaissance Group. | 
| - 03.12.1915: | Exercises in the Baltic Sea. | 
| 04.12.1915: | Sent to the North Sea. | 
| 16-18.12.1915: | With other ships of the II Reconnaissance Group, the Frankfurt covers the operation of three torpedo boat flotillas. | 
| Mar - Apr 1916: | Used during Hochseeflotte fleet operations. | 
| 21.04.1916: | The cruiser is unsuccessfully attacked by a British submarine. | 
| 24.04.1916: | During the cover operations at the battlecruiser attack on Great Yarmouth, the cruiser sinks a British patrol boat. | 
| 24.05.1916-01.06.1916: | As flagship of the II. Reconnaissance Group, the ship takes part at the battle of Jutland where it is not damaged. | 
| 04.06-07.07.1916: | Repairs at Kiel, the gun mountings are modified. | 
| 18-19.08.1916: | Frankfurt
 covers fleet operations. | 
| 23-24.09.1916: | The cruiser protects two torpedo boat flotillas near the Doggerbank. | 
| 25-26.09.1916: | Another torpedo boat support operation. | 
| Spring 1917: | Patrol duty in the North Sea, training in the Baltic Sea. | 
| 29.05-18.06.1917: | Repairs in Wilhelmshaven. | 
| 16.08.1917: | Frankfurt
 covers mine hunters in the North Sea. | 
| 03-22.09.1917: | Training in the Baltic Sea. | 
| 23.09-27.10.1917: | Operations at the Baltic Islands. | 
| 02-03.11.1917: | Reconnaissance operations in the German Beight. | 
| 16-17.11.1917: | During another reconnaissance operation, the Frankfurt
 is engaged by several British warships. While the cover group of German battleships and battlecruisers support the cruiser, the Frankfurt
 is hit several times. | 
| -17.12.1917: | Repairs in Kiel. | 
| 21.1-10.02.1918: | Training in the Baltic Sea. | 
| 10-13.03.1918: | Together with Emden II
, Graudenz
 and Bremse
, the Frankfurt
 operates at Jutland against allied merchant shipping. | 
| 10-13.05.1918: | Mine operations. | 
| -Aug 1918: | Operations in the Baltic Sea. | 
| 30.09.1918: | Because of a prop damage, the ship is sent to Wilhelmshaven for repairs. | 
| -08.10.1918: | Repairs. | 
| 21.10.1918: | During training exercises, the Frankfurt
 rams the U-boat UB89
 which sinks after the collision. | 
| 26.11.1918: | Interned at Scapa Flow. | 
| 21.06.1919: | The attempt to scuttle the ship fails, and the ship is towed into shallow water. | 
| Jul 1919: | The ship is raised. | 
| Summer 1921: | Taken over by the USA, the Frankfurt
 is transferred to Cape Henry. | 
| 18.07.1921: | Sunk by a bomb during an experimental air attack. |