An ineffective thesis statement on the causes of the French Revolution would be "The frivolous spending of the monarchs lead to the common man losing money." This would be ineffective as it fails to create a bigger picture and does not go into proper depth. More detail is better, as it leads to a more subjective thesis.
If we are talking about World War 2 japan then they tried at first to embargo japan. But in December 3rd 1939 japan attacked pearl harbor and the U.S. declared war.
Answer: 1) prospectors discover oil in Bartlesville, 2) Charles Haskell becomes the first governor of Oklahoma, 3) World War I begins, 4) Congress passes the Indian Citizenship Act