This document is a mid-semester report submitted by Lalit Kr. Singh summarizing his two month internship at Larsen & Toubro Heavy Engineering. The report includes declarations, acknowledgements, and discusses regulatory frameworks, tax incentives, and export strategies for key markets - Brazil, United Kingdom, United States, and Israel. It analyzes the strengths, weaknesses, opportunities, and threats (SWOT) and political, economic, social, and technological factors (PEST) affecting India's defense industry and increasing exports. The report provides recommendations to help India's defense sector increase international sales.