Final answer:
Catherine the Great's rise to power was supported by generals and nobles who were key to her successful coup against her husband, Peter III.
Step-by-step explanation:
The power grab by Catherine the Great was supported by a combination of generals and nobles who were instrumental in her successful coup against her husband, Peter III. Despite their marriage, Peter the Third certainly did not 'beg her to take power' so he could play with his toy soldiers, nor did Catherine accomplish her ascension to power all by herself. Her rise to power was a calculated move that was backed by powerful factions within the Russian political structure of the time, especially those who were displeased with Peter III's policies and actions. It was the support from key generals and noble conspirators that ultimately facilitated Catherine's ascension to the Russian throne and allowed her to become one of the most famed rulers in the country's history.