15 Mar–20 May 1815Murat leads Naplesin war against Austria
16 Mar 1815Belgium unitedwith Netherlands
20 Mar 1815Napoleon arrivesin Paris, restoringFrench Empire
25 Mar 1815Seventh Coalitionforms against Napoleon
5–17 Apr 1815Mt Tambora erupts;causes Year WithoutSummer in 1816
7 Apr 1815Lombardy annexedto Austrian Empire