After being appointed dictator for life, he was assassinated by Brutus, among others, on the Ides of March, 44 b.c.
In 44 b.c. he was 
mnli hypothesis: In 44 b.c. he was  premise: After being appointed dictator for life, he was assassinated by Brutus, among others, on the Ides of March, 44 b.c.