One hundred years after the start of the Great War, none of the participants remain alive, and we are left with aging relics, fading photographs, scarred landscapes being reclaimed by nature, and memorials and graveyards across the globe.
Source: World War I in Photos: A Century Later - The Atlantic
Nearly four years of deadly stalemate on the Western Front slowly came to an end in 1918, as Allied armies pushed into Germany at enormous cost, leading the Central Powers to finally seek an armistice.
Source: World War I in Photos: The Western Front, Part II, and Armistice - The Atlantic
The recent civil war in Yemen prompted neighboring Saudi Arabia to intervene militarily six weeks ago, launching airstrikes, bombing targets from border stations, shelling from the sea, and establishing a blockade.
Source: The Saudi Arabia-Yemen War of 2015 - The Atlantic (graphic images ahead)