linguistic:paraphrasing
Brock and the Siege of Detroit

On August 14, Major-General Isaac Brock, British commander of Upper Canada, arrived at Fort Malden and began preparations for attacking Hull at Fort Detroit. Tecumseh, upon hearing of Brock's plans, reportedly turned to his companions and said, "This is a man!" Tecumseh and Brock "formed an immediate friendship that served to cement the alliance." Brock's high esteem for Tecumseh likely contributed to a popular belief that Tecumseh was appointed a brigadier general in the British Army, though this is a myth.

Tecumseh led about 530 warriors in the Siege of Detroit. According to one account, Tecumseh had his men repeatedly pass through an opening in the woods to create the impression that thousands of Native Americans were outside the fort, a story that may be apocryphal. To almost everyone's astonishment, Hull decided to surrender on August 16.

Afterwards, Brock wrote of Tecumseh:

He who attracted most of my attention was a Shawnee chief, Tecumset, brother to the Prophet, who for the last two years has carried on, contrary to our remonstrances, an active warfare against the United States. A more sagacious or a more gallant warrior does not I believe exist. He was the admiration of every one who conversed with him.

Brock likely assured Tecumseh that the British would support Native American land claims. He wrote his superiors that restoration of land "fraudulently usurped" from the Native Americans should be considered in any peace treaty. News of Detroit's capture revived British discussion of creating of an Indian barrier state to ensure the security of Upper Canada. After his short stay in the area, Brock returned to the Niagara frontier, where he was killed in action several weeks later. Meanwhile, the British had negotiated a temporary armistice and called off further offensives. Tecumseh was frustrated by the unexpected British-American armistice, which came at a time when his confederacy was attacking other American forts and needed British support. In September 1812, he and Roundhead led 600 warriors to assist in an attack on Fort Wayne, but the siege failed before they arrived. Another siege against Fort Harrison also failed. Tecumseh stayed in the Prophetstown region for the remainder of 1812, coordinating Native American war efforts.