They wanted to suspend Chinese immigration
After the Greek War for Independence concluded, Greece became a monarchy. ... Ottoman rule and the war itself depleted the Greek economy and people turned to their leadership for aid. The monarchy did what they could. However, the people were still largely discontent.
Texas' natural resources today are mainly mineral, gas and oil. Back in the age of exploration, the technology to use such resources didn't exist, but Texas was still rich in other things, especially fertile land near the rivers basins, edible crops and wild plants and specially animals to hunt, such as the buffalo or deer.