Editing 1st Mars Expeditionary Force (section)

==Notable Actions==
===Operation Salamander, Ferryman's Rest, Segmentum Pacificus, 907.M41===
A unit of stranded Vostoryan Firstborn and the Baneblade Imperator Dominor were cornered by a significant Chaos force. The 1st MEF was in the area and came to assist. The combination of the attack of the 1st and the Vostoryan's attached Valkyries broke through the Chaos stranglehold around the encircled troops. 1st MEF personnel, with their vast knowledge of all things mechanical, were able to repair the knocked out Battle Cannon of the Baneblade just as the Chaos Lord leading the attack was making preparations for a final assault of the small fort the Firstborn were trapped in. As the Chaos Lord stood atop a hill and waved his power fist forward for the attack to start, the main Battle Cannon became fully operational once more. A quick thinking Lieutenant of the 1st scrambled into the turret and ordered the dumbfounded crew to load the massive gun. He then fired the mighty weapon directly at the Chaos leader and by the grace of the Emperor the abomination was vaporized by the high velocity armor piercing round. This caused the heretic forces to become disoriented and allowing the 1st and their allies to rout what was left of the foul abominations. Afterwards it was learned that these men were all that was left of elements of the 75th Vostoryan. They then joined the 1st MEF in a show of gratitude for their rescue and the Baneblade and Valkyries came with them, much to the chagrin of the Navy Captain who lent the Transports.

===Operation Tusk, Hive Manufactorum XII, Segmentum Pacificus, 912.M41===
A group of the 1st MEF were diverted from the main regiment to assist in the retaking of a factory world and came across an Armored Fist company of Armageddon Steel Legion troops and were awed by the aggressive tenacity the troops showed when they dismounted their Chimeras and fought off the Tau forces that were holed up inside the Manufactorum. They aided the Armageddon troops in the retaking of the world and collected some Chimeras and troops from that revered Legion.

===Operation Heatwave, Herrick's Folly, Segmentum Pacificus, 920.M41===
The 1st MEF was deployed en masse to engage an army of Renegades who have been pirating and raiding several worlds in the sector, catching them on the planet of Herrick's Folly. The Command Chimera was blasted out from underneath with the staff inside by some form of booby-trap, but by the Emperor's grace everyone survived the blast. The Armored forces of the 1st MEF and the Imperator Dominor claimed several armor kills and many infantry divisions of the enemy force were eliminated. Unfortunately due to some problems with mobility for both sides due to the unexpected weather on the planet, the battle turned into an 11 month trench war until the rebels finally surrendered. During this time, Sergeant Johannes Stromm, formerly of the Armageddon Steel Legion, was credited for the eradication of a foul Greater Daemon during the latter part of the conflict. The Armageddon troops are given better training then the other units of the Force and often serve as a form of Stormtrooper.

===Operation Frost, Corinth IV, Segmentum Tempestus, 925.M41===
During the "Great Picking Off" of Fort 345, an Ork and Tyranid force assaulted the fort held by the 1st MEF and some Astartes of the Dark Angels 3rd Company. The rocket artillery and tanks ensured that not one Xenos got within 5000 feet of the great bastion walls. As reward for their actions, the Planetary Governor contributed a Battery of Basilisks, a Medusa, and twin Manticores to the 1st MEF.

===Operation Cog, several worlds, Segmentum Solar, 941.M41===
Whilst the 2nd War for Armageddon, the leaders of Mars tasked the 1st Mars with the job of investigating several locations thought to be hiding STC data long thought to be on Ork controlled planets. The 1st Mars fulfilled their job to the letter, recovering several artifacts and a of Valdor tank Hunters traced back to the Siege of Vraks. They also acquired a small contingent of the Cadian 34th Infantry Regiment and the surviving members of the Cadian 134th Super-Heavy Regiment who were off for repairs.

===Operation Janus/Operation Sledgehammer, Segmentum Pacificus, 950.M41===
The First Mars, once again in their primary deployment zone of the Segmentum Pacificus, were called upon to quell a rebellion happening nearby, on the planet Saar. Once the rebellion was crushed and the Planetary Governor's palace on-top of Mount Metallicus was retaken, a small contingent of the 1st planned to complete their true objective, to secure a Mechanicus STC Template for higher velocity Autocannons buried deep beneath the Palace, whilst the rest of the Regiment returned from destroying other rebel strongholds across the planet. However, they were unable to complete their task before a contingent of Orks from a nearby raiding fleet landed forces near the palace, drawn in by the calls for assistance from the Governor prior to the 1st Mars arriving. A heated battle began, with Ork forces rushing headlong into the crudely constructed defenses of the 1st Mars. The 1st quickly called for aid as they setup Artillery and Anti-Air defenses near the Palace as the Valdor Tank Hunter and the Laser Tank Destroyer took to the streets of the city at the mountain's base. That aid was answered in the form of the rest of the 1st Mars, along with the great war hero Commissar Yarrick and a Warhound Titan "Malleus Vermiculus" of the Legio Invicta. The reinforcements quickly began to pour into the battle, and in good timing as well. Imperator Dominor, badly damaged but boldly fighting a Ork Stompa single-handed, was saved by the last minute arrival of Malleus Vermiculus, who dealt the killing blow to the Stompa with a well placed shot from her Turbo-Lasers.