Share This Article 1. On 10 April 1864 this man declared himself Emperor of Mexico. Joseph Napoleon III of France Don Pedro II of Brazil Ferdinand VII of Spain Archduke Maximilian of Austria 2. Sometime around 1781 James Monroe named his estate this. Montpelier Mount Pleasant Brookwood Long Branch 3. The so-called “July Plot” to kill Hitler is often referred to by this code name. Operation Downfall Operation Savior Operation Wolfkill Operation Valkyrie Loading …