During the Battle of Earth, they participated in various engagements with Covenant forces in Old Mombasa. Upon In Amber Clad's arrival in Mombasa, the frigate launched three Pelicans in an attempt to enter the Prophet of Regret's Assault Carrier. However, the three Pelicans were attacked by a Scarab and ended up as such. The lead Pelican containing Master Chief Petty Officer John-117 and Sergeant Major Avery Johnson escaped the surprise attack, but however caught a burst of plasma on its right flank and crashed into a building. The second Pelican failed to evade the attack and is destroyed. The third Pelican containing GSGT Marcus Stacker and a fireteam of ODSTs caught a burst of plasma at its left engine, causing it to crash land near a beach.
After an incident involving an camouflaged Sangheili in the alleys of New Mombasa, the group met up with the Master Chief and a Warthog and continued to hold their newly claimed command post within Hotel Zanzibar.