Conversation so far:
what happened to mihail sadoveanu in the 1910's?
In 1910, he was also appointed head of the National Theater Iasi, a position which he filled until 1919.
what else was he appointed to?
He was a leading presence at Minerva newspaper, alongside Anghel and critic Dumitru Karnabatt.
what was his greatest accomplishment named in the article?
Mihail Sadoveanu became a professional writer in 1908-1909, after joining the Romanian Writers' Society.
who did he work with?
he, Iosif, and Anghel, together with author Emil Garleanu.
what did they do?
set up Cumpana, a monthly directed against both Ovid Densusianu's eclecticism and the Junimist school (the magazine was no longer in print by 1910.
what is the most important fact in this article?
Sadoveanu was again called under arms during the Second Balkan War of 1913.

Question: what did he do?
Self-contained rewrite: what did Mihail Sadoveanu do in 1913?