What was the eastern boundary set by the Republic of Texas in 1836?

The eastern boundary set by the Republic of Texas in 1836 was established as 3 marine leagues into the Gulf from the mouth of the Sabine River. This distance, which is approximately 9 nautical miles, was a typical boundary distance recognized at the time for coastal territories. Setting the boundary at this distance allowed Texas to establish its jurisdiction over the offshore waters while also indicating where state control ended and federal waters began.

Historical documents show that this boundary was primarily a practical consideration, aimed at providing a clear demarcation for legal and economic purposes. It reflects the common practices of that era regarding coastal jurisdiction. Understanding this context is vital because it highlights Texas's attempts to claim maritime resources and manage navigation. Other answers might reference different distances or points along the Texas coastline, which would not accurately reflect the boundaries established by the Republic of Texas in the 1836 context.