Apr 1885US & Chile intervenein Panama
Sep 1886Geronimo surrendersfor last time aftermore escapes
Feb 1887Venezuela seversrelations with Britainover border dispute
Aug 1889Ontario-Manitobaboundary defined
2 Nov 1889North & South Dakotabecome US states
8 Nov 1889Montana becomesUS state
11 Nov 1889Washingtonbecomes US state
May 1890Oklahoma Territorycreated
3 Jul 1890Idaho becomesUS state
Jul 1890Wyomingbecomes US state
29 Dec 1890Wounded Knee Massacre:US Cavalry slaughtershundreds of Lakota