The statement is "false" due to the fact that the great schism does not have to do with three popes. The great schism or East- west schism is the loss of communion between the western orthodox churches and the Catholic church. And this great schism began in 1054.
The way the phalanx formations helped the Spartan soldiers was D. It helped keep them safe from harm during battles.
<h3>What is a Military Formation?</h3>
This refers to the arrangement of soldiers in different ways in order to make them more effective in battle.
Hence, we can see that the Spartan soldiers were famous for their valor in battle and they had their phalanx formation to thank as each man protected his brother in battle at the sides.
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