Nearly every German ace who flew before the summer of 1918 scored victories in Albatros fighters, whose introduction coincided with the development of the famous and highly successful Jagdstaffeln, the first true German fighter formations, which became a critical German air tactic and helped to wrest back air superiority from the Allies. After wreaking havoc in the skies over Arras the Albatros was eventually outclassed by succeeding generations of Allied aircraft, but still remained the most numerous and ubiquitous of all German fighters in World War I, with Albatros biplanes contributing almost two-thirds of the German fighters at the front during the Spring Offensive of 1918.