What is referred to by 'a us state capital'?

What is associated with: a us president april 22 1994? What is referred to by 'a us president birchard'? What is referred to by 'a us president lbj'? What is associated with: a us stamp from 1965 commemorated the 700th anniversary of the birth of this italian poet? What is referred to by 'a us state mt'? What is referred to by 'a us state th'? What is referred to by 'a us state'? Based on the clue 'a us tank is named for this civil war general who ...', what is the answer?