Metalloids are metallic-looking brittle solids that are either semiconductors or exist in semiconducting forms, and have amphoteric or weakly acidic oxides. Typical nonmetals have a dull, coloured or colourless appearance; are brittle when solid; are poor conductors of heat and electricity; and have acidic oxides.
(1860-1948).At the age of 56, John J. Pershing became the commander of the American Expeditionary Force that helped to turn the tide in favor of the Allies and against the Central Powers during World War I. For his leadership during the war, he was promoted to the rank of general of the armies.
U.S. President Woodrow Wilson initially planned to give command of the AEF to General Frederick Funston, but after Funston's sudden death, Wilson appointed Major General John J. Black Jack Pershing in May 1917; Pershing remained in command for the entire war.owever the AEF did not participate at the front until late October 1917, when the 1st Division fired the first American shell of the war toward German lines, although they participated only on a small scale. A formation of regular soldiers and the first division to arrive in France, entered the trenches near Nancy.