War of 3039
Assigned to the Fifth Donegal Guards shortly after graduation, Bennett was on Ryde in January 3039 for the jump-off position in the conflict that would be known as the War of 3039. In April, together with the Twenty-third Arcturan Guards, the Fifth Donegal Guards launched the attack on their Wave One target ofAlrakis. Despite the majority of the 5th Donegal remaining in orbit, Bennett made planetfall, perhaps as part of a regimental liaison with the 23rd Arcturan. She was credited with eight kills on Arakis, being particularly effective against Shadow Hawks and Dragons at short-range. During the campaign Bennett would use her lasers to carve an "E" in the chest of each 'Mech she defeated.
Marriage and children
Bennett owned and piloted a GRF-1E Griffin which she nicknamed "Sparky". Prior to the War of 3039 she had replaced the LRM launcher of her Griffin with five medium lasers, one mounted in each torso, one beside the PPC and two in Sparky's left arm. The additional weight saved went towards an extra heat sink and an additional ton of armor. 
- Elle Bennett's Sparky would be the first of two Griffin Hero 'Mechs introduced in MechWarrior Online.
- Technical Readout: 3039, p. 287, "GRF-1N Griffin"
- Historical: War of 3039, p. 137, "Deployment Table - 5th Donegal Guards"
- Historical: War of 3039, pp. 28-29, "Alrakis"
- Jihad Turning Points: New Avalon, p. 1, "The Show Must Go On"
- Record Sheets: 3039 Unabridged, p. 459