Political map of Europe & the Mediterranean on 30 Oct 1864 (German Unification: Second Schleswig War), showing the following events: Austrian and Prussia troops enter Schleswig, marking beginning of Second Schleswig War; Great Britain cedes Ionian Islands to Greece; In September Convention with France, Italy renounces claim to Rome and Florence becomes Italian capital; At Treaty of Vienna, Denmark agrees to cede Schleswig-Holstein to Austria and Prussia.