National World War I Museum in Kansas City, Mo.
Dave Kaup/Reuters/Corbis

On June 28, 1914, a teenage assassin fired two shots outside of a delicatessen in Sarajevo, Austria-Hungary, killing the Austrian Archduke Franz Ferdinand and triggering a series of events that led to the world’s first global conflict. This year marks the centennial of the outbreak of World War I, and widespread commemorations are in store. Among them is a new exhibit at the National World War I Museum in Kansas City, Mo., which houses the most diverse collection of World War I artifacts in the world. “On the Brink: A Month That Changed the World,” examines the political backdrop and press coverage of the assassination, presenting the incident and its aftershocks as never seen before. The exhibit runs through Sept. 14. In the meantime, centennial commemorations are taking many other forms in America and abroad.

Boston
“Over There! Posters From World War I,” at the Museum of Fine Arts, Boston, will display more than 40 war posters from the United States and Europe, including rarely seen examples from Britain, France, Germany and Russia. Through May 25, 2015. 

West Point, N.Y.
Uniforms of the major combatants in 1914 feature prominently in a new centennial exhibit in the History of Warfare Gallery at the West Point Museum. It’s the first in a series of installations that will rotate annually and correspond to different periods of the war. Opens Aug. 1.

London
Following a renovation, The ­Imperial War Museum reopens IWM London July 19 and will feature several permanent WWI galleries displaying a rich array of objects large and small — from lucky charms made from shell fragments to a Harrier jet and a V2 rocket.

Washington, D.C.
“Images of the Great War — the European Offensives: 1914-1916,” is a new exhibit running through Aug. 10 at the Woodrow Wilson House.