I canâ€™t answer your first question about the civil war in Galveston, but as the the second, almost all of the Cocke and Greene Co. Tenn. Isenhour/Eisenhower families were Northern supporters except for a few that went to Texas Initially.; After the War, Texans felt humuliated by Yankee occupation and at least one of my Woobright families that started Hillsboro, HIll Co. Tex. above Austin, joined boat loads of other likeminded foldks and went to Brazil rather than live under the Yankee yolk. There were at least four different colonies that failed eventuallly to establish farming colonies and all ented up in Americanus where to this day,; one quarter of the City seal boasts the stars and bars banner. They also introduced the mold board plow, water melon and fired chicken and bisquets and they still celebrate the 4th of July every year in Portuguese.
Other than the few that went to Texas the rest of the Cocke Co. Tenn folks were Northern sympathizers. AFter the War, about a third stayed put, some went to Inidana and the rest to Barton Co Mo. around 1868-1872 and surrounding counties between Springfield and Lamar (H. S. Trumanâ€™s birth site)
My maternal great-grandmother, d/o John Conrad Null ISENHOUR [Eisenhour] was one of them.
So, given the adverse conditions in Texas after the War and good cheap land in free state Missouri, and relatives in the area to sing the praises of the new land I suppose this is the reason why a number of Texas Eisenhowers / Isenhours moved to Missouri. at that time. Several of John C. N. Isenhourâ€™s grandchildren in Barton Co. adopted the Eisenhouer spelling and the Lamar, Vernon Co. people went with Isenhour.
The St. James CEmetery at Milford, Mo in Barton Co. has nearly 100 Eisenhouer-Isenhours buried there.
A few next generation Barton and Vernon Co. folks did a reverse emigration in the late 1880s to Texas
I have more on this family if you are interested.
Jim Woolbright email@example.com