Since when he Francis Wallace Grenfell's rank in the British Army been the highest rank?
Francis Grenfell, 1st Baron Grenfell Field Marshal Francis Wallace Grenfell, 1st Baron Grenfell, GCB, GCMG, PC (29 April 1841 – 27 January 1925) was a British Army officer. After serving as aide-de-camp to the Commander-in-Chief, South Africa, he fought in the 9th Xhosa War, the Anglo-Zulu War and then the Anglo-Egyptian War. He went on to become Sirdar (Commander-in-Chief) of the Egyptian Army and commanded the forces at the Battle of Suakin in December 1888 and at the Battle of Toski in August 1889 during the Mahdist War. After that he became Governor of Malta and then Commander-in-Chief, Ireland before retiring in 1908.
Francis Philip Woodruff Frank Richards a.k.a. Francis Philip Woodruff DCM, MM (1883–1961) was a World War I soldier and author. Born in Monmouthshire, he was orphaned at the age of nine, and was then brought up by his aunt and uncle in the Blaina area of the South Wales Valleys in industrial Monmouthshire. The uncle, his mother's twin brother, and surnamed Richards, adopted Frank who then changed his surname. During the 1890s Frank Richards worked as coal miner and joined Royal Welch Fusiliers in 1901, serving in the British Empire forces in British India under the British Raj and Burma from 1902 to 1909, after which he transferred to the reserves. He is best known as the author of one of the most widely acclaimed memoirs of the Great War to be written by a ranker, "Old Soldiers Never Die".