Simplify the following text for a Grade 18 native English-speaking person.
Original: His actions included the Capture of Fort Ticonderoga in 1775 , defensive and delaying tactics despite losing the Battle of Valcour Island on Lake Champlain in 1776 , the Battle of Ridgefield , Connecticut ( after which he was promoted to major general ) , operations in relief of the Siege of Fort Stanwix , and key actions during the pivotal Battles of Saratoga in 1777 , in which he suffered leg injuries that ended his combat career for several years .
Simplified: 1775 the Capture of Fort Ticonderoga 1776 defensive and delaying tactics after losing the Battle of Valcour Island on Lake Champlain the Battle of Ridgefield , Connecticut ( when was promoted to major general ) , relieving the Siege of Fort Stanwix , and 1777 actions in the Battles of Saratoga , in which he suffered leg injuries that ended his combat career for several years .