The Zimmermann telegram and the sinking of the "Lusitania" were the main reasons for the U.S. entry into World War I.
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The history of the British Army spans over three and a half centuries since its founding in 1660 and involves numerous European wars, colonial wars and world wars. From the late 17th century until the mid-20th century, the United Kingdom was the greatest economic and imperial power in the world, and although this dominance was principally achieved through the strength of the Royal Navy (RN), the British Army played a significant role.
As of 2015, there were 92,000 professionals in the regular army (including 2,700 Gurkhas) and 20,480 Volunteer Reserves.[1] Britain has generally maintained only a small regular army during peacetime, expanding this as required in time of war, due to Britain's traditional role as a sea power. Since the suppression of Jacobitism in 1745, the British Army has played little role in British domestic politics (except for the Curragh incident), and, apart from Ireland, has seldom been deployed against internal threats to authority (one notorious exception being the Peterloo Massacre).The British Army has been involved in many international conflicts, including the Napoleonic Wars, the Crimean War and both World War I and World War II. Historically, it contributed to the expansion and retention of the British Empire.
The British Army has long been at the forefront of new military developments. It was the first in the world to develop and deploy the tank, and what is now the Royal Air Force (RAF) had its origins within the British Army as the Royal Flying Corps (RFC). At the same time the British Army emphasises the continuity and longevity of several of its institutions and military tradition.
The French Revolution was waaaaay more violent. In the French Revolution they were beheading and killing monarchs and aristocrats while the U.S one wrote a Declaration of Independence. The guillotine was made specifically in the French Revolution for the main purpose of killings the upper class. So many more people died in the French Revolution and it was the first time that a country had reacted so violently to their government. There was even a cult dedicated to the French Revolution and so many people in the underclass were killed either because they were not radical enough or because they would help the aristocrats escape
On December 20, 1861, Sibley issued a proclamation to the people of New Mexico Territory, the southern portion of which was styled the Confederate Territory of Arizona. The proclamation, designed to placate the local population, included promises of security and payment for needed supplies.
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On April 25, 1898 the United States declared war on Spain following the sinking of the Battleship Maine in Havana harbor on February 15, 1898.