Endless Foot Assault

Although the tokens created by the last ability are attacking, they were never declared as attacking creatures. Abilities that trigger whenever a creature attacks won't trigger when those tokens enter attacking.

You may pay the squad cost any number of times. You will create a token that is a copy of that permanent for each time you paid the squad cost. If you paid the squad cost multiple times, the tokens will all enter the battlefield simultaneously.

If the spell resolves but the permanent with squad leaves the battlefield before its squad ability resolves, you'll still create the token copies.