The Cyclops Team were assigned to carry out Operation Rubicon, a plan to capture the Gundam prototype "Alex". However, the team's superior, Colonel Killing, didn't actually intend for them to complete Operation Rubicon, and instead planned for them to fail so he could use it as justification for nukes to be dropped on Side 6.
During their attempt to complete the operation, Hardy, Garcia and Kaminsky were all killed. Bernie later died when he was killed in battle against the Alex Gundam.
Principality of Zeon