Rosecrans's chief of staff later became a president of the united states. who was this man? william mckinley. james garfield. ulysses s. grant. andrew johnson.

brainliest is someone you pick by simply clicking a button. it only shows up if there are two people that answered your question, then you decide who answer more accurately with detail and explanation and you give that person the title "brainliest".

i hope this your understandings.

the answer to your question is true

explanation:

hope this and mark me as brainliest!