1864
ID: 375
William Stanley Jevons publishes 'Pure Logic', critiquing and simplifying Boole's system
ID: 375
1864
ID: 944
Pope Pius IX issues Syllabus of Errors condemning 80 modern propositions
ID: 944
1864
ID: 945
Second Schleswig War - Prussia and Austria defeat Denmark, gain Schleswig-Holstein
ID: 945
1864
ID: 5539
Daewongun becomes regent, enforces strict isolation policy - Korea becomes 'Hermit Kingdom'
ID: 5539
1864
ID: 5583
Moltke perfects railway mobilization plans - Prussia can concentrate armies faster than any European power using detailed timetables
ID: 5583
1864
ID: 5584
Prussian army fully equipped with Dreyse needle gun - breech-loading rifle allows soldiers to fire prone at 5 rounds per minute
ID: 5584