The thesis "The Market Effect of Trade War on International Soybean Market" explores the impact of the U.S.-China trade war on global soybean trade, with China imposing a 25% tariff on U.S. soybeans in 2018. This led to a sharp decline in U.S. exports to China, with Brazil stepping in to become the primary supplier. The thesis analyzes production costs, transportation efficiencies, and geopolitical factors influencing the shift. Brazil's soybean industry benefited from the trade war, while U.S. farmers experienced significant economic losses. The research highlights how the trade war reshaped global soybean supply chains, with long-term implications for both countries' agricultural sectors.