More powerful air force radar and message decoding technologies.
The Germans made efforts to bomb Royal Air Force airfields and take out Britain's radar defense system, but the outnumbered RAF fighters managed to outmaneuver their opponents, aided by radar technology.
As for message decoding technologies, the code-cracking machine developed by Alan Turing had an impact particularly on naval battles in the Atlantic between the Germans and the Allies. Once they developed the ability to decode German messages, the British had to proceed carefully and not act on every military message or the Germans would have suspected their encoded messages were being hacked.
During the 1850s, tensions between the North and South increased as the nation decided to how to incorporate the vast territories that had been acquired during the Mexican-American War of 1846-1848. The question of whether each territory was to be slave or non-slave worsened sectional tensions.
