"Lötzen" Infantry Brigade was created on 16 August 1939 on the basis of existing Landwehr regiment in eastern East Prussia in order to add flank protection for the 3rd Army in its invasion into Poland. The brigade was made up of two Landwehr regiments (each consisting 3 battalions) and one Landwehr engineer battalion. The brigade included three infantry regiments and an artillery regiment, formed in the Landwehr mode (reservists aged 35–45), a battalion of sappers and reconnaissance and communications departments. In November 1939, the brigade was reformed in Giżycko and merged into the 311th Infantry Division commanded by General Paul Goeldner.