Share This Article 1. On 10 April 1864 this man declared himself Emperor of Mexico. Don Pedro II of Brazil Archduke Maximilian of Austria Ferdinand VII of Spain Joseph Napoleon III of France 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 Valkyrie Operation Savior Operation Wolfkill Loading …