Key Facts
- Start date
- 13 January 1945
- End date
- 25 April 1945 (formal); 9 May 1945 (full surrender)
- Duration
- ~3.5 months
- Soviet penetration (1st offensive)
- 30–60 km into east-northern Poland
- Major engagement
- Battle of Königsberg
Strategic Narrative Overview
The main offensive launched on 13 January 1945, with multiple Soviet fronts driving into East Prussia. The campaign isolated German forces from the rest of the Reich, cutting off large formations and pushing toward key cities. The Battle of Königsberg, the regional capital, became a central and brutal engagement. German units were encircled in pockets and subjected to sustained Soviet pressure throughout the winter and spring months.
01 / The Origins
By late 1944, Soviet forces had pushed deep into Eastern Europe, and East Prussia — the historic heartland of the German military tradition — became a primary strategic objective. A preliminary Soviet offensive in October 1944 penetrated 30–60 km into the region but stalled due to heavy casualties and insufficient reserves. The Red Army regrouped and prepared a larger, more sustained operation to sever and reduce the German-held territory.
03 / The Outcome
The offensive concluded with Soviet victory on 25 April 1945, though isolated German units continued resistance until Germany's unconditional surrender on 9 May 1945. East Prussia was effectively destroyed as a German territory; its population was expelled or fled westward. The region was subsequently divided between the Soviet Union, which absorbed Königsberg (renamed Kaliningrad), and Poland, which received the southern portion.
Belligerents & Mobilization Analysis
Side A
1 belligerent
I.D. Chernyakhovsky.
Side B
1 belligerent
Kinetic Engagement Axis
Scroll horizontally to view full axis. Events plotted relatively.