The Maryland Boundary Line Agreement refers to the legal agreement that establishes the precise and mutually agreed boundaries of the state of Maryland, United States. It is a formal arrangement between Maryland and its neighboring states that aim to settle any disputes regarding the territorial boundaries. There are two main types of Maryland Boundary Line Agreements: 1. Delaware-Maryland Boundary Line Agreement: This agreement specifically defines the boundary between the state of Maryland and the state of Delaware. The original boundary between the two states was established by the Calvert's, the proprietors of Maryland, and William Penn, the proprietor of Pennsylvania, in the 17th century. However, the boundary remained ambiguous, leading to conflicts and disputes between Maryland and Delaware. As a result, several boundary line agreements were signed, including a significant one in 1921. The agreement aimed to clarify the boundaries and ensure that both states agreed on where the line is located. 2. West Virginia-Maryland Boundary Line Agreement: This agreement concerns the shared boundary between Maryland and West Virginia. It addresses the specific location and demarcation of the border between the two states. The boundary line was initially established during the American Civil War when West Virginia seceded from Virginia and Maryland remained loyal to the Union. However, due to various factors and evolving geographic circumstances, the boundary required clarification and confirmation. Thus, multiple agreements were signed between the two states to resolve any discrepancies or potential disputes. It is worth mentioning that boundary line agreements play a crucial role in maintaining peaceful relations between neighboring states and preventing conflicts that might arise due to territorial disputes. These agreements are often based on historical records, surveys, and the cooperation of both parties involved. They provide legal certainty, defining the limits and jurisdictions of the states involved and allowing for efficient governance and administration of the territories in question.