Schwerpunkt
Schwerpunkt (Ger., center of gravity), militarily, as much as the main point of attack, i. e. the point that is chosen for an attack [or counter-attack in defense] or evolves into a main point of attack under the circumstances of the engagement; by definition, the Schwerpunkt is the point of deepest penetration of the enemy front line, so it automatically has Anschluss, i. e. the lead, and neighbouring units guide their movements on it.
Source: Meyers Großes Konversations-Lexikon, 6. Auflage 1905–1909