when?
July 27th, 1759.
Fort Carillon
 The British moved in on July 27 and, though they worked in 1759 and 1760 to repair 
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.
wiki:11718650
Fort Carillon [SEP] British capture
They then moved out to Fort Saint Frédéric with the regiment of Hébécourt, captain of the La Reine regiment. Bourlamaque did the same to Fort Saint Frédéric on July 31. After that, they moved up to Isle-aux-Noix where Amherst declined to advance against them, preferring to consolidate his forces in the lower Lake Champlain area. In withdrawing, the French used explosives to destroy what they could of the fort and spiked or dumped cannon they did not take with them. The British moved in on July 27 and, though they worked in 1759 and 1760 to repair and improve the fort (which they renamed Fort Ticonderoga), the fort saw no more significant action in the war.