| − | A subsidiary offensive of the 1916 [[Somme Offensive]], the Battle of Flers-Courcelette marked the debut of [[tanks]]. Twelve British divisions and 50 tanks charged into battle on September 11, 1916, but gained only a mile of ground. Although the tanks were impervious to small arms fire, they were extremely slow, difficult to navigate and often bogged down in the thick mud on the Western Front. | + | A subsidiary offensive of the 1916 [[Somme Offensive]], the Battle of Flers-Courcelette marked the debut of [[tanks]]. Twelve British divisions and 50 tanks charged into battle on September 11, 1916, but gained only a mile of ground. Although the tanks were impervious to small arms fire, they were extremely slow, difficult to navigate and often bogged down in the thick mud on the Western Front.<ref>http://www.firstworldwar.com/battles/flers.htm</ref> |