August von Mackensen in the context of Army Group Mackensen (Poland)

The German–Ottoman alliance was ratified by the German Empire and the Ottoman Empire on August 2, 1914, shortly after the outbreak of World War I. It was created as part of a joint effort to strengthen and modernize the weak Ottoman military and to provide Germany with safe passage into the neighbouring British colonies.

The Gorlice–Tarnów offensive during World War I was initially conceived as a minor German offensive to relieve Russian pressure on the Austro-Hungarians to their south on the Eastern Front, but resulted in the Central Powers' chief offensive effort of 1915, causing the total collapse of the Russian lines and their retreat far into Russia. The continued series of actions lasted the majority of the campaigning season for 1915, starting in early May and only ending due to bad weather in October.

Mackensen viewed securing a breakthrough as the first phase of an operation, which would then lead to a Russian retreat from the Dukla Pass, and their positions north of the Vistula.

Totenkopf (German: [ˈtoːtn̩ˌkɔpf], literally "dead person's head") is a German compound word for death's head. The word is often used to denote a figurative, graphic or sculptural symbol, common in Western culture, consisting of the representation of a human skull – usually frontal, more rarely in profile with or without the mandible. In some cases, other human skeletal parts may be added, often including two crossed long bones (femurs) depicted below or behind the skull (when it may be referred to in English as a "skull and crossbones"). The human skull is an internationally used symbol for death, the defiance of death, danger, or the dead, as well as piracy or toxicity.

In English, the term Totenkopf is commonly associated with 19th- and 20th-century German militarism, particularly in Nazi Germany.