The city that the British wanted to block was *

New England

Explanation:

During the American Revolutionary War around 1777, coupled with the addition of about eight thousand support from Canada.

The British government in their attempt to win the war under the advice of John Burgoyne declared that his armies could seize and take over the Hudson River.

Thereby isolate New England from the other colonies. This is in the hope that General William Howe would lay a great assault in Philadelphia.

the triple alliance. germany and austria-hungary were already allies by 1879 when, worried about a threat from russia, they formed the dual alliance. italy joined the group in 1882. there was a concern about a possible attack from france and the alliance needed powerful friends to defend it.

cultural history is your answer