During this decade, former Georgia governor George Mathews asked the slave Tony Proctor to garner native support for a war against Spain, but Proctor used a native language to warn chiefs not to trust the US. Early in this decade, some plantation owners invaded Amelia Island and declared the Republic of East Florida. (-5[1])The ambiguously worded Article Nine of a treaty signed in this decade enabled the US to take over native land which was formerly a British-backed buffer zone in the west. At the end of this decade, (*) Florida was ceded to the US in the Adams-Onís treaty. (10[2])In this (-5[1])decade, the Creek confederacy was forced to give up much of Alabama (-5[1])by Andrew Jackson. For 10 points, in which decade was the Treaty of Ghent signed just before the battle of New Orleans? ■END■ (10[2])