Joppa's "mile wide harbor" on the Gunpowder River could accommodate the largest ocean-going ships of the day. Joppa was Maryland's most important commercial center in colonial times, with tobacco being the primary commodity crop and export. Long before Baltimore was established, this was one of the busiest ports in the western hemisphere.
Joppa's "mile wide harbor" on the Gunpowder River could accommodate the largest ocean-going ships of the day Joppa was Maryland's most important commercial center in colonial times, with tobacco being the primary commodity crop and export. Long before Baltimore was established, this was one of t.he busiest ports in the western hemisphere.