I think the extradition ruling[1] from the UK judge assigned to the case provides a pretty good overview. (In general, I'd suggest trying to find primary sources as much as you can, because there's a lot of misinformation flying about about the case) Below are some of the allegations not related to Thordarson:

> It is alleged that WikiLeaks solicited material by publishing a list of information it wished to obtain, its “Most Wanted Leaks”. In November 2009 this list included: “Bulk Databases” including “Intellipedia”, (a non-public CIA database) and classified “Military and Intelligence” documents. In December 2009, Mr. Assange and a WikiLeaks affilia te gave a presentation to the 26th Chaos Communication Congress in which WikiLea ks described itself as “the leading disclosure portal for classified, restricted or legally threatened publications.” In 2009 Mr. Assange spoke at the “Hack in the Box Security Conference” in Malaysia in which he made reference to a “capture the flag” hacking contest and noted that WikiLeaks had its own list of flags that it wanted captured.

> Between November 2009 and May 2010, Ms. Manning was in direct contact with Mr. Assange using a chatlog (the “Jabber communications”). On 8 March 2010, it is alleged that Mr. Assange agreed to assist Ms. Manning in cracking a password hash stored on a DoD computer. Mr. Assange indicated that he was "good" at "hash-cracking" and that he had rainbow tools (a tool used to crack Microsoft password hashes). Ms. Manning provided him with an alphanumeric string. This was identical to an encrypted password hash stored on the Systems Account Manager (SAMS) registry file of a SIPRNet computer, used by Ms. Manning, and associated with an account that was not assigned to any specific user. Mr. Assange later told her that he had no luck yet and asked for more “hints.” It is alleged that, had they succeeded in cracking the encrypted password hash, Ms. Manning might have been able to log on to computers connected to the classified SIPRNet network under a username that did not belong to her, making it more difficult for investigators to identify her as the source of the disclosures. It is specifically alleged that Mr.Assange entered into this agreement to assist Ms Manning’s ongoing efforts to steal classified material.

> On 31 December 2011, WikiLeaks tweeted “#antisec owning Law enforcement in 2012.” It included links to emails and databases confirming that Hammond and AntiSec had hacked two US state police associations. On 3 January 2012, WikiLeaks tweeted a link to information which LulzSec/AntiSec had hacked and published in 2011 headed,“Anonymous/Antisec/Luzsec releases in 2011.” In January 2012, Hammond told Sabu that “JA” had provided Hammond with a script to search the emails stolen from Intelligence Consulting Company, and that “JA” would provide the script to associates of Hammond as well. Hammond also introduced Sabu via Jabber to “JA.” In January and February 2012, Sabu used the chatlog Jabber to communicate with Mr.Assange. On 27 February 2012, WikiLeaks began publishing emails that Hammond and others hacked from the Intelligence Consulting Company. On 27 February 2012 Hammond told Sabu, “we started giving JA” materials that had been obtained from other hacks. On 28 February 2012 Hammond complained to Sabu that the incompetence of his fellow hackers was causing him to fail to meet estimates he had given to Mr. Assange about the amount of hacked information he expected to provide to WikiLeaks, stating, “can’t sit on all these targets dicking around when the booty is sitting there ... especially when we are asked to make it happen with WL. We repeated a 2TB number to JA. Now turns out it’s like maybe 100GB. Would have been 40-50GB if I didn’t go and get all the mail from [foreign cybersecurity company].” Hammond then asked for help with ongoing computer intrusion committe d by his associates against victims including a US law enforcement entity, a US political organisation, and a US cybersecurity company. In March 2012, Hammond was arrested.

> In June 2013, media outlets reported that Edward J. Snowden had leaked numerous documents taken from the National Security Agency and was in Hong Kong. It is alleged that, to encourage leakers and hackers to provide stolen materials to WikiLeaks, Mr.Assange and others at WikiLeaks openly displayed their attempts to assist Snowden to evade arrest.

[1] https://www.judiciary.uk/wp-content/uploads/2021/01/USA-v-As...