The Collaborative International Dictionary
Captaincy \Cap"tain*cy\, n.; pl. Captaincies.
The rank, post, or commission of a captain.
--Washington.
Captaincy general, the office, power, territory, or jurisdiction of a captain general; as, the captaincy general of La Habana (Cuba and its islands).
Wikipedia
The Captaincy General was a division of a viceroyalty in Spanish or Portuguese colonial administration. Captaincies general were established districts that were under threat from foreign invasion or Indian attack. Their governors were the Captains general. Captaincies general, on account of their independence and distance from the crown, became virtual viceroyalties, having a direct relationship with the king and the Council of the Indies, in Madrid.
Usage examples of "captaincy general".
The coastal land which he already held, he said, and all the lands he would in future discover, would henceforth be known as the Captaincy General of New Spain.