The Atlantic Slave trade was not only a benefit to colonist nations who sought out slaves. The kingdoms of Africa also took advantage of this opportunity. The colonist nations would pay the governments of Africa handsomely for their slaves, so the kingdoms of Africa would willingly hand over their own people to the colonists for the money. This would eventually lead to competition among the kingdoms and cause millions of African people to be sold off as slaves, ergo, causing the kingdoms to lose many of its workers and human resources; thus, causing the swift collapse of the African kingdoms.
The hessians main goal for winning the war was to "get paid by the British"--since they were hired mercenaries who had no real interest in American independence.
True, the Tejas blamed the Spaniards for an outbreak of deadly disease. The Spanish started to colonize there bring diseases over with them, and as Indians gave them land they gave new and unknown elements to the land like the pilgrims did.
It was "New Amsterdam" that was founded by the Dutch in the early-1600s and is now known as New York City, since they wanted to name this colony after the capital of their homeland.