Specifically via the intermodal containers located throughout the map Cargo.
The west side of the map has blue containers printed with RELLECK and white containers printed with XPERIENCE (also note that XPERIENCE is immediately preceded by a symbol that looks like a squarish zero).
The east side of the map has red containers printed with ARCHED.
Seems innocent enough. Oh, does it seem ever so innocent.
ARCHED sounds a bit like "ahead". Treyarch, 3arc, ARC. Treyarch ahead. Treyarch is ahead of what? RELLECK sounds like "relic". 0XPERIENCE = zero experience. A relic with zero experience, but compared to what? Red containers, blue containers. Red oni, blue oni. Red vs. Blue. RoosterTeeth. Red vs. Blu. Team Fortress 2. Treyarch vs. Infinity Ward. Infinity Ward HQ is west of Treyarch HQ (and Treyarch HQ is east of Infinity Ward HQ). Activision = Cargo. Treyarch = ARCHED. Infinity Ward = RELLECK.
Treyarch is ahead of the relic with zero experience that is Infinity Ward.