Why did the English have to attack Fort McHenry, how did they attack it and what did the failure of the attack lead to?

In an effort to gain control of rivers and supply lines west of the Appalachians reason why the English attack Fort Henry.

The fort had been partially flooded by recent rainstorms, and the bad weather had left many of the troops left to defend it.

The failure of the attack open up the river highway to the heart of the south

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