He was a part of the army that was sent to repel the Pretender Dmitrii Ivanovich 's invasion of Muscovy in 1604 -- 05 .
After several years service , Margeret rose to the rank of overall commander of the Tsar 's foreign troops .
Margeret was a part of the army that was sent to repel the Pretender Dmitrii Ivanovich 's invasion of Muscovy in 1604 -- 05 .
After several years service , Margeret rose to the rank of overall commander of the Tsar 's foreign troops .