State and local governments also increased taxes during the 1930s, with many imposing individual income taxes for the first time. All these tax increases killed incentives for work, investment, and entrepreneurship at a time when they were sorely needed.
Explanation:
As you can see, taxes were also increased or stayed the same which didn’t really help the people. Because of this, they demanded new forms of government.
if memory serves me, it was a border dispute with Mexico over the Texas territory. The Mexicans attacked an American patrol and that was the start of the conflict. But also idk and I could be wrong.