Explainer-How Amazon's battle with Reliance for India retail supremacy became a legal jungle

FILE PHOTO: The logo of Amazon is pictured inside the company's office in Bengaluru, India, April 20, 2018. REUTERS/Abhishek N. Chinnappa

NEW DELHI (Reuters) - For more than a year, Amazon.com Inc and India's Future Group have been locked in a complex legal stand-off that has stalled Future's $3.4 billion sale of assets to the U.S. firm's rival Reliance Industries - with no end in sight.

Here's what the dispute, seen as key to deciding who gets an upper hand in one of the world's fastest-growing retail markets, is all about.