During the interwar period, aircraft and tank technologies matured and were combined with systematic application of the traditional German tactic of Bewegungskrieg (maneuver warfare): deep penetrations and the bypassing of enemy strong points to encircle and destroy enemy forces in a Kesselschlacht (cauldron battle/battle of encirclement).[2][5] During the invasion of Poland, Western journalists adopted the term blitzkrieg to describe that form of armored warfare.[6] The term had appeared in 1935, in the German military periodical Deutsche Wehr ("German Defence"), in connection to quick or lightning warfare.[7]