The term 'Soldiers, Formation of' can be summarized by the word 'Phalanx', which is a seven-letter word. A phalanx is a type of military formation used by ancient Greek and Macedonian armies. It consists of a large number of soldiers standing in close order, usually in a rectangular formation, with shields overlapping and spears pointing outward. This formation was used to protect the soldiers from enemy attacks and to maximize their offensive capabilities.