16–20 Jul 1917July Days mutiny in Russia
31 Jul–10 Nov 1917Allied offensiveon Passchendaele
1–3 Sep 1917Germans capture Riga
9–14 Sep 1917Kornilov attempts military coup in Russia
14 Sep 1917Russian Republic proclaimed
12–20 Oct 1917Germans occupyEstonian islands
24 Oct–19 Nov 1917Italians defeatedat Caporetto
7–8 Nov 1917Bolsheviks seize power.Russian government collapses