Kansas territory
That latitude defines portions of the northern border of the Texas panhandle, part of the Arkansas/Missouri state line, and part of the Tennessee/Kentucky state line.
Was known to be from West Plains, Missouri, but his homestead was in Lanton, Missouri, off Hwy 17, about 15-20 miles South of West Plains, near the Arkansas state line.
Everywhere West of Missouri. The line of latitude at Missouri's Southern border was taken as the dividing line. North of that line, slavery was illegal. South of it, slavery could be practised.
Lots of states are west of Illinois; the two immediately bordering it on the west are Iowa and Missouri.
Episcopal Diocese of West Missouri was created in 1890.
West o' the Wide Missouri was created in 1968.
Tennessee is bordered on the west by Missouri and Arkansas.
On the west, Illinois is bordered by Iowa and Missouri.
It is on south (west bank) side of the Missouri River.
West
It flows into the Mississippi River. In 1805, Lewis and Clark used the Missouri River to navigate further west into Missouri valley which was part of the Louisiana Purchase (1803). The Missouri River may be considered longer than the Mississippi if you include the rivers that are not actually named the Missouri but represent its main headwaters. The Missouri River drains a vast area of the north central US, from Montana, Wyoming, and the Dakotas, across Nebraska and Kansas to Missouri. It defines part of the state borders for 5 states.