Anticipating an Allied offensive, the German occupiers transformed Doesburg’s historic fortifications into modern defensive positions. A network of trenches, mortar pits, and anti-tank obstacles was constructed, extending into the riverbanks. Many of these were dug by Dutch forced laborers under German command. The aim was to delay or repel any Allied attempt to cross the IJssel. 

In early April 1945, Canadian forces from the I and II Corps advanced through Gelderland, liberating towns such as Arnhem and Angerlo. Rather than attacking Doesburg head-on, Canadian commanders opted to encircle the city and isolate it. Artillery and air power were used to pressure German troops inside, while surrounding roads were blocked to cut off supply and escape routes. The city was intentionally bypassed in the main advance to prevent a costly urban battle. 

The siege began on the night of 3–4 April, with Canadian artillery shelling the city at a reported rate of 20 shells per minute. Key infrastructure, including the Martinitoren (Martini Tower), military barracks, and the IJssel bridge, was targeted. On 5 April, German troops destroyed the bridge themselves—along with secondary crossings and later, out of spite, the synagogue, the water tower, a mill, and the prominent church tower. One eyewitness recalled: “We lived on the west side … the cellar was far too small … we spent 14 days underground.” 

The citizens of Doesburg spent two weeks sheltering in basements and crawlspaces, terrified of incoming fire and uncertain about what lay ahead. Supplies were scarce, and communication with the outside world was cut off. Stories from survivors describe sleepless nights, the thunder of explosions, and the psychological strain of waiting while the city was slowly pounded into submission.  

On 15 April 1945, German troops finally withdrew from Doesburg, setting fire to buildings and detonating final charges as they left. Canadian troops entered the city to scenes of cautious celebration and immense relief. The people of Doesburg emerged into the daylight after two harrowing weeks.