HELPPP ME PLZ I'LL GIVE BRAINILIEST! Look at the image.

Identify and describe the military tactic shown, and explain how it helped the Greek city-states develop strong militaries.

Phalanx, in military science, tactical formation consisting of a block of heavily armed infantry standing shoulder to shoulder in files several ranks deep. Fully developed by the ancient Greeks, it survived in modified form into the gunpowder era and is viewed today as the beginning of European military development.

united states reinforcements contributed greatly to three allied victories in france at: cantigny (first major american battle), argonne (the largest in the united states military history, involving 1.2 million american soldiers), and château-thierry (one of the first actions under general pershing).

it increased the power of the king of england.