Historic Minnesota events with anniversaries this week.

Feb. 21

2005 Three Minnesota National Guardsmen—David Day of St. Louis Park, Jesse Lhotka of Appleton, and Jason Timmerman of Tracy—are killed in Iraq, marking the deadliest day for Minnesota soldiers since Vietnam. Lhotka is credited with saving a fellow guardsman’s life and helping evacuate another soldier before being killed by the roadside blast.

Feb. 22

1855 The Mississippi, Pillager, and Lake Winnibigoshish bands of Ojibwe sign a treaty ceding to the U.S. government a major portion of heavily wooded north-central Minnesot...