Final answer:
The beginning of Daisy and Gatsby's relationship was characterized by a strong love, but circumstances and social differences led Daisy to marry someone else while Gatsby was away at war. Gatsby returned committed to winning Daisy back by building a fortune and living close to her.
Step-by-step explanation:
The beginning of Daisy and Gatsby's relationship five years before the main events of 'The Great Gatsby' was marked by a deep, passionate love. During that time, Gatsby was a young military officer who met Daisy in her hometown of Louisville. They fell in love, but when Gatsby went off to fight in World War I, the distance and their different social statuses made it difficult for their romance to last.
Daisy, who came from a wealthy background, ended up marrying Tom Buchanan, a man of her same social class, while Gatsby was still abroad. However, Gatsby's love for Daisy was resilient, and upon his return, he dedicated himself to amassing a fortune to win her back. He purchased a mansion on West Egg, just across the bay from Daisy's home in East Egg, and threw lavish parties in the hope that Daisy would one day wander in.