If my fighter attacks a ground territory and wins can it land there or does it have to fly back to a territory that I controlled from the beginning of the turn?
If your’s attacking the capital, you wouldn’t want to SBR, 'cause the IPC’s will be yours after the takeover. If attacking a non-capital IC, go ahead, as it depletes your enemy’s IPC’s.
Both moves are legal, the first just wouldn’t do you any good. :-D
Sometimes you only have one unit to move to somewhere else SSG Rock.
If you have 10 ARM and want to transport them all on the same turn you will require 10 transports. You may load those 10 TRN with 10 INF as well but as mentioned you are not required to do so.