There's more than one place called '''Zamboanga''':
Zamboanga City - capital city, and a sub-region, of the Zamboanga Peninsula
Zamboanga Del Norte - one of three provinces in the Zamboanga Peninsula region
Zamboanga Del Sur - one of three provinces in the Zamboanga Peninsula region
Zamboanga Peninsula - a region on the island of Mindanao
Zamboanga Sibugay - one of three provinces in the Zamboanga Peninsula region