Johanna Expedition | |||||||
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Part of the African Slave Trade Patrol | |||||||
![]() USS Dale off San José del Cabo, Mexico in 1847, by William Henry Meyers. | |||||||
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Belligerents | |||||||
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Commanders and leaders | |||||||
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Strength | |||||||
1 sloop-of-war U.S. Navy U.S. Marines |
1 fort 1 blockhouse | ||||||
Casualties and losses | |||||||
None |
1 fort damaged 1 blockhouse damaged |
The Johanna Expedition, or Anjouan Expedition, was a naval operation that occurred in August 1851 during the American anti-slavery patrols off Africa. The event was unrelated to slavery and began after the seizure of the merchant ship Maria and her captain at Johanna Island. The United States Navy sent a sloop-of-war to free the captain, who was still being held, and to demand compensation for the incident. When Sultan Selim refused, the Americans briefly bombarded the island's fortifications.[1][2]