I want to know the answer to the following question:
Why couldn't the French and English take control of the field?
All the background I'm provided with is that "In the center, the Russian forces crossed the Danube and laid siege to Silistra from 14 April with 60,000 troops, the defenders with 15,000 had supplies for three months.:415 The siege was lifted on 23 June 1854.". Is that enough to answer the question?
Answer: no