||Part of the 1st Reconnaissance Group (1. Aufklärungsgeschwader) at the outbreak of the war.
||Unsuccessful search for British battlecruisers in the German Beight.
||Operation J1: Coastal bombardment of Yarmouth.
||Operation J2: Coastal bombardment of Hartlepool.
||Battle at the Doggerbank against British battlecruisers. Seydlitz
was hit twice, both backward turrets burned out.
||During the coastal bombardment of Yarmouth and Lowestoft, the Seydlitz
was hit by a mine on the approach and returns to Germany with 1400 t water in the ship.
||Battle of Jutland: Seydlitz
was the most damaged ship of the German fleet. The battlecruiser sinks the British battlecruiser Queen Mary
, but is hit 23 times and by a torpedo of the destroyer Petard
. Both backward turrets are burned out again. The ship returns to Germany with over 5300 t water in the ship with its own power, sailing backwards since most damage is in the bow section.
||Repairs in Wilhelmshaven.
||Unsuccessful raid in the North Sea.
||Unsuccessful raid in the Northern North Sea.
||Interned at Scapa Flow.
||Scuttled by own crew.
||Broken down at Rosyth.