This year marks the 80th anniversary of the outbreak of the Second World War. This resource contains a theme for each phase of primary school from FS to UKS2 and builds up a comprehensive understanding of various aspects of the war.
 
Themes:
FS and KS1 - rememberance and why we wear a poppy
LKS2 - the home front and the blitz and evacuation 
UKS2 - why the war began and how propaganda influenced people 
 
It is available for free here