Complex sentence: The United States defeated Barbados 8--0 at home in the first-leg and won 1--0 in an away game to beat Barbados 9--0 on aggregate.
Split into simpler sentences: The United States started off emphatically by defeating Barbados 8--0 at home in the first-leg. They followed up by winning 1--0 in an away game for the second leg to beat Barbados 9--0 on aggregate.