Core Insights - Amazon has launched one-hour and three-hour delivery options in the U.S. to enhance customer convenience and compete with Walmart in the delivery space [2][3][7] Delivery Service Expansion - One-hour delivery is available in hundreds of U.S. cities, including major metropolitan areas like Los Angeles, Chicago, and Washington, D.C., as well as smaller cities like Des Moines, Iowa [3] - Three-hour delivery is being offered in over 2,000 communities, with plans to expand further in the coming months [7] Competitive Landscape - Walmart claims it can deliver products to 95% of U.S. households in less than three hours, leveraging its extensive network of brick-and-mortar stores as micro-fulfillment nodes [9] - Both companies are investing in their delivery capabilities, with Walmart retrofitting regional distribution centers for supply chain automation while Amazon is enhancing its search engine functionalities [10][11]