International sales is the academic field investigating the principles, processes, and implications of commercial transactions involving the sale of goods or services across national borders. This research area examines the strategic, economic, legal, and logistical dimensions of these exchanges, including the application of international trade theory, the navigation of diverse regulatory and tax environments, and the management of cross-cultural complexities. Its significance lies in understanding how cross-border commerce drives economic efficiency, facilitates global market integration, and shapes firm-level competitive strategies within the international arena.