1868 Laramie County was created and boundaries defined as "all that portion of the Territory of Dakota west of the one hundred and fourth meridian west ..." and Fort Sanders named the county seat by the Sixth Dakota Legislative Assembly on January 9, 1867. On January 3, 1868, the Seventh Dakota Legislative Assembly redefined the western boundary and changed the county seat to Cheyenne.
1903 On January 3, 1903, President Theodore Roosevelt signed the bill creating Wind Cave National Park. It was the eighth national park created and the first one created to protect a cave.
1943 POW camp at Douglas approved on January 3, 1943.