Who did czar Nicholas 2nd leave in charge in world war 1?

Czar Nicholas II left his wife, Empress Alexandra, in charge of the Russian state while he went to the front lines during World War I. However, he also appointed General Alexei Brusilov to command the Russian armies. Nicholas's decision to take personal command of the military was controversial and ultimately contributed to the decline of his authority and the Russian monarchy. Alexandra's reliance on the mystic Rasputin for advice further alienated the public and exacerbated the political turmoil.