who was known as the man of blood and iron in world history
Otto von Bismarck On 30 September 1862, Bismarck made a famous speech to the Budget Committee of the Prussian Chamber of Deputies in which he expounded on the use of "iron and blood" to achieve Prussia's goals:
ABO blood group system It was subsequently found that the Czech serologist Jan Janský had independently pioneered the classification of human blood into four groups in 1907,[9] but Landsteiner's independent discovery had been accepted by the scientific world while Janský remained then in relative obscurity. However, in 1921 an American medical commission acknowledged Janský's classification. Jan Janský is nowadays credited with the first classification of blood into the four types (I, II, III, IV).