However , Howe 's attack on Philadelphia diverted troops needed up in Saratoga .
Burgoyne expected Sir Henry Clinton , under the orders of General Howe , to aid him in the invasion by sailing up the Hudson River from the south .
General Howe 's attack on Philadelphia diverted troops needed up in Saratoga .
Burgoyne expected Sir Henry Clinton , under the orders of General Howe , to aid him in the invasion by sailing up the Hudson River from the south .