The youngest ever General in Canada's army was Robert Moncel, who at age 27 was promoted to Brigadier in 1944 during World War 2. In moderns times, the youngest Brigadier was Daniel Menard, who was 43. Jennie Carignan at age 47 was Canada's first female combat General in 2016. While Mary Krohnert's age is not listed, she appears to be in her 30's, so it would be unlikely she would make such a high rank at such a young age.