On 21 and 22 April 1946 in the Soviet occupied zone, the German Social Democrat Party (SPD) and the German Communist Party (KPD) merge to form the Socialist Unity Party (SED).

On 21 April 1946, Wilhelm Pieck, leader of the German Communist Party (KPD), and Otto Grotewohl, leader of the Social Democratic Party (SPD) in the Soviet-occupied zone, take part in a ceremony held in the Berlin State Opera House to mark the establishment of the Socialist Unity Party (SED). Walter Ulbricht, Secretary-General of the newly formed party, unveils its official banner.

On 21 April 1946, Wilhelm Pieck, Leader of the Communist Party of Germany (KPD), and Otto Grotewohl, Leader of the Social Democratic Party (SPD), establish the Socialist Unity Party (SED) in the Soviet-occupied zone of Germany.

On 21 April 1946, Wilhelm Pieck, leader of the German Communist Party (KPD), and Otto Grotewohl, leader of the Social Democratic Party (SPD) in the Soviet occupation zone, found the Socialist Unity Party (SED) at a ceremony in the Berlin Opera House.

On 22 April 1946, the first Congress of the Socialist Unity Party of Germany (SED) is held in Berlin under the chairmanship of Walter Ulbricht. The party was founded the previous day by Wilhelm Pieck, leader of the Communist Party of Germany (KPD), and Otto Grotewohl, leader of the Social Democratic Party (SPD) in the Soviet occupation zone.

On 23 April 1946, the French daily newspaper Le Monde analyses the implications of the creation of the Socialist Unity Party of Germany (SED) following the merger of the German Social Democratic Party (SPD) and the Communist Party of Germany (KPD).

On 30 May 1946, Otto Grotewohl, Chairman of the Socialist Unity Party (SED), delivers a speech on Radio Moscow in which he sets out the SED's duties.