"When I asked for reinforcements, I didn't think they'd send a Spartan, let alone 'three' of them"! (Surprised a Fireteam of Spartans have joined the ongoing assault).

"Captain, multiple enemy slipspace signatures incoming, three CCS Class Battlecruisers on our portside"! (In the utmost moment amount of time you are becoming battle ready).

"This is Group Beta Three, we've engaged with ground forces beneath the Crater, requesting immediate assistance, over". (After discovering the enemy position, you are in dire need of help but keeping your cool under high levels of stress).