system
Given the following post, respond as if you're commenting on Reddit:
human
[Avengers] How did HYDRA get a Chitauri Leviathan to Sokovia?

You'd think they would have all been accounted for and someone would notice if one went missing.  Not to mention *how* did they even transport it and then place under a castle?
gpt
Well, it would have been transported during the height of SHIELD's power. Between the Battle of New York, and the Fall of SHIELD, SHIELD had a huge boost in power and funding. The HYDRA members embedded within all aspects of SHIELD probably were able to cover up the misplacement of a Leviathan.