Afterwards , Henry decided to march with his army across the French countryside towards Calais despite the warnings of his council .
On 12 August 1415 , Henry sailed for France , where his forces besieged the fortress at Harfleur , capturing it on 22 September .
Afterwards , Henry decided to march with Henry 's army across France French countryside towards Calais despite the warnings of his council .
On 12 August 1415 , Henry sailed for France , where his forces besieged the fortress at Harfleur , capturing it on 22 September .