However, United won't know who their opponent is until the Extra Preliminary Round Replay between the sides is played on Wednesday 16th August after their initial replay last Wednesday was postponed due to a waterlogged pitch.
Depending on which team is victorious, there are two possible scenarios of when the fixture will be played.
If Chatham Town are victorious, then United will travel to the CJ Doors Stadium on Saturday 19th August, 3pm kick off.
The club will also be looking at taking a coach to the fixture, but this will be confirmed following the replay.
If Littlehampton Town are victorious, then United will travel to The Sportsfield on Sunday 20th August, 3pm kick off as the ground is scheduled to host a Cricket match on the Saturday.
At present, there are no plans for the club to run a coach to the fixture.
Full details regarding the fixture will be published once the relevant agreements have been made with the winning side
Updated 21:48 - 12 Aug 2017 by Dean Allchin