"thus commencing" is a correct and usable phrase in written English.
It can be used to indicate the beginning of an action or event in a formal or literary context. Example: "Thus commencing their journey, the brave explorers set out into the unknown depths of the jungle."
"Not yet," I answered, only too happy to close the document on my computer screen and open the Pawleys Island Realty Web site, thus commencing our annual hunt for the perfect vacation rental.
The following day, the Roman Senate officially declared Vespasian emperor of the Roman Empire, thus commencing the Flavian dynasty.
Thus commenced the smear campaign against the Khalil Gibran International Academy and, specifically, Debbie Almontaser.
The Court long ago noted the venerable role the Declaration plays in our tripartite system of government in Florida: "It is significant that our Constitution thus commences by specifying those things which the state government must not do, before specifying certain things that it may do.
These cycles thus commence the Task phase of the lesson activity.
Crystallization thus commences from a heterogeneous mixture of native chains and chains with a longer persistence length (higher effective rigidity) and consequentially a lower effective height of the entropic barrier for crystallization.
Thus commenced one of the hardest winters I've been through.
Thus commenced several years of often-intense negotiations and much legal wrangling.
Thus commenced his unprecedented and whimsical 21-year reign over America.
When the SETT-pain rating had reached 6 (or 60 grips had been conducted) the CPM-test thus commenced.
Old Flame Sword fires up his flame sword, the wights advance like ants at a picnic, the men brace themselves, and thus commences about an hour and a half of growling and swordplay.
