When did Manta Network launch?

Could you please elaborate on the timeline surrounding the launch of Manta Network? I'm particularly interested in knowing when the initial announcement was made, if there were any pre-launch events or roadshows, and ultimately, the precise date when the network went live. This information is crucial for understanding the project's evolution and how it has been received by the cryptocurrency and finance community. Additionally, I'm curious if there were any significant challenges encountered during the launch phase that the Manta Network team had to overcome.