who was opposite the british in this battle?
The French.
Battle of Ticonderoga (1759)
A British military force of more than 11,000 men under the command of General Sir Jeffery Amherst moved artillery to high ground overlooking the fort, which was defended by a garrison of 400 Frenchmen under the command of Brigadier General François-Charles de Bourlamaque.

where was battle of ticonderoga fought? Fort Carillon (later renamed Fort Ticonderoga). where is this former fort situated? South of Lake Champlain and north of Lake George. who captured it? The British. when? July 27th, 1759. was any battle fought for that? The 1759 Battle of Ticonderoga.
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Battle of Ticonderoga (1759) [SEP] Introduction
The fort's powder magazine was destroyed, but its walls were not severely damaged. The British then occupied the fort, which was afterwards known by the name Fort Ticonderoga. They embarked on a series of improvements to the area and began construction of a fleet to conduct military operations on Lake Champlain. The French tactics were sufficient to prevent Amherst's army from joining James Wolfe at the Battle of the Plains of Abraham. However, they also tied up 3,000 of their own troops that were not able to assist in Quebec's defense. The capture of the fort, which had previously repulsed a large British army a year earlier, contributed to what the British called the "Annus Mirabilis" of 1759.