| Action of 23 November 1856 | 
|---|
| Part of the Filibuster War | 
| | Date | 23 November 1856 | 
|---|
 | Location |  | 
|---|
 | Result | Filibuster victory | 
|---|
 | 
| Belligerents | 
|---|
| Filibusters | Costa Rica | 
| Commanders and leaders | 
|---|
| Lt. Callender I. Fayssoux | Don Antonio Villarostra | 
| Strength | 
|---|
| 1 schooner, 28 men, 2 six pound carronades | 1 brig, 114 men, 4 nine pounders | 
| Casualties and losses | 
|---|
| 1 killed, 8 wounded | 1 brig, 74 killed | 
The action of 23 November 1856 was a minor naval engagement during the Filibuster War between the Nicaraguan (Filibusters) schooner Granada and the Costa Rican brig Once de Abril, which took place off San Juan del Sur, Nicaragua.