This game can be played alone or as a pre-game of 1930s politics for the
World in Flames game also by ADG.
From the ADG rules:
1.0 INTRODUCTION
Days of Decision (DOD) is Australian Design Groups' strategic level game
of the politics and conflict leading up to the Second World War. Two to
seven players each manage the economics and conduct the political and
military operations of one or more of the Major Powers involved.
Days of Decision consists of 2 games in 1. The standard 1936-1939 game
requires not other components than those provided in this game. It is
played on the map of Europe and the Pacific and uses an abstract combat
system to represent the conflicts occurring in this period. The 1936-1946
Grand Campaign Game require World in Flames to be used in conjunction
with Days of Decision to resolve the military conflicts. Finally, there
is also a World in Flames mini scenario of the Spanish Civil War which
requires some components from World in Flames.
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The game is about who will (if any) declare the Second World War, how
the production of the Major Powers are at the time of war and how
the many small nations will align (Axis or Allied). It has been replaced
by DoDII, which adds the Communist alignment. DoDII has recently been
replaced by DoDIII.