Complex sentence: The Warner Park Sporting Complex was the site of the allocated first round matches of the tournament, and this made St. Kitts and Nevis the smallest country in the world to ever host any World Cup event.
Split into simpler sentences: The Warner Park Sporting Complex was the site of the allocated first round matches of the tournament. This made St. Kitts and Nevis the smallest country in the world ever to host a World Cup event.