Hero of Bladehold

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever this creature attacks, create two 1/1 white Soldier creature tokens that are tapped and attacking.

March of the Machine Commander

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever Hero of Bladehold attacks, create two 1/1 white Soldier creature tokens that are tapped and attacking.

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Mirrodin Besieged

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
Whenever Hero of Bladehold attacks, put two 1/1 white Soldier creature tokens onto the battlefield tapped and attacking.

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Although the tokens are attacking, they never were declared as attacking creatures (for purposes of abilities that trigger whenever a creature attacks, for example).

Whenever Hero of Bladehold attacks, both abilities will trigger. You can put them onto the stack in any order. If the token-creating ability resolves first, the tokens each get +1/+0 until end of turn from the battle cry ability.

You choose which opponent or planeswalker an opponent controls that each token is attacking when it is put onto the battlefield.