The next morning, Pontiac, in hopes of regaining Gladwyn's confidence, repaired to the Fort with but three of his chiefs, and bearing in his hand the pipe of peace. Offering it to Gladwyn he again protested his friendship for the British, whom he declared "we love as our brothers." A few days later, the Indians thronged the open field behind the Fort gate. It was closed and barred. Pontiac, advancing, demanded admittance. Gladwyn replied that he might enter, but only alone. The great chief, baffled and enraged, then "threw off the mask he had so long worn" and boldly declared his intention to make war. A day or two later the four tribes, Ottawas, Ojibwas, Pottawottomis, and Wyandots, clamored about the Fort, and the attack was begun by volleys of bullets fired at the palisade walls. Thus opened the famous siege of Detroit, which lasted six months, from May 1 to November 1 (1763), one of the longest and most bitterly contested sieges in the history of Western Indian warfare.

The incomparable treachery of Pontiac in endeavoring to secure the Fort by dissemblance of friendship was further evidenced by his pretence at a truce. Pontiac declaring his earnest desire for "firm and lasting peace," requested Gladwyn to send to the camp of the chief, Captain Campbell, Gladwyn's second in command, a veteran officer and most upright and manly in character. Campbell went, was made prisoner, and subsequently was foully and hideously murdered. Pontiac neglected no expedient known to Indian perfidy, cruelty, or deviltry. He surpassed his race in all the detestable elements of their nature. His conduct from first to last was only calculated to create distrust, contempt, and loathing. His warriors murdered the British settlers in the vicinity of the Fort, burned their huts, robbed the Canadians, and committed every variety of depredation.

Pontiac, realizing the seriousness of the situation and the obstinate courage of the British garrison, prepared for a lengthy campaign. He ordered the Ottawa village moved across the river to the Detroit side, where it was located about a mile and a half northeast of the Fort, at the mouth of Parent's Creek, afterward known as Bloody Run.

The garrison bravely and patiently withstood all assaults and bided the time of rescue. By midnight sallies and other expedients they removed all exterior buildings, fences, trees, and other obstacles that lay within the range of their guns or that might afford protection to sneaking and stealthy Indians who would crawl snakelike close to the palisade and fire at the sentinels and loop-holes, or shoot their arrows tipped with burning tow upon the roofs of the structures within the Fort. Fortunately the supply of water was inexhaustible; the provisions were wisely husbanded; friendly Canadians across the river, under cover of night, brought supplies.

These Canadian farmers were also subject to tribute to the Indians, who seized their supplies by theft or open violence. They appealed to Pontiac, and about the only creditable act recorded of that perfidious chief was his agreement to make restitution to the robbed settlers. Pontiac gave them in payment for their purloined property promissory notes drawn on birch-bark and signed with the figure of an otter—the totem to which he belonged—all of which promises to pay, it is said, were redeemed.

Day after day passed with varying incidents of attack and repulse. The keen-eyed watchfulness of the Indians never for an instant abated; their vigils were tireless and ceaseless; woe to the soldier who ventured without the Fort or even lifted his head above the palisade. Pontiac's patience was strengthened with the delusive idea that the French were only temporarily defeated and would rally to his assistance. He even despatched messengers across the interior to the French commandant, Neyon, at Fort Chartres on the Mississippi, requesting that French troops be sent without delay to his aid. Meanwhile Gladwyn had sent one of his schooners to Fort Niagara to hasten promised reënforcements from the British.

Lieutenant Cuyler had already (May 13th) left Niagara with convoy of seven boats, ninety-six men, and quantities of supplies and ammunition. This little fleet coasted along the northern shore of Lake Erie until near the mouth of the Detroit River. The force attempted to land, when a band of Wyandot Indians suddenly burst from the woods, seized five of the boats, and killed or captured sixty of the soldiers. Cuyler with the remaining men (thirty-six), many of whom were wounded, escaped in the other boats and crossed to Fort Sandusky, which they found had been taken and burned by the Wyandots; the garrison had been slaughtered and Ensign Paully sent prisoner to Pontiac's camp. Cuyler with his escaping companions slowly wended his way back, where he reported the result of his expedition to the commanding officer, Major Wilkins.

At the same time the Wyandots, with the captured boats and prisoners, proceeded up the Detroit to Pontiac's quarters, arriving in full sight of the Fort's garrison, when Gladwyn, of course, learned of the destruction of the Cuyler flotilla. The disappointment to the inmates of the Fort was almost unbearable. Gladwyn's schooner, however, reached Fort Niagara and returned about July 1st, laden with food, ammunition, and reënforcements, and the most welcome news of the Treaty of Paris. Pontiac, undismayed, continued his efforts. His forces now numbered, it is recorded, about eight hundred twenty warriors: two hundred fifty Ottawas, his own tribe and under his immediate command; one hundred fifty Pottawottomis, under Ninivay; fifty Wyandots, under Takee; two hundred Ojibwas, under Wasson; and one hundred seventy of the same tribe, under Sekahos.

The two schooners were a serious menace to the movements of the Indians, and many desperate attempts were made to burn them by midnight attacks, and the floating of fire-rafts down upon them; but all to no avail. Pontiac had the stubborn persistency of a later American general who said he would fight it out on that line if it took all summer. He exerted himself with fresh zeal to gain possession of the Fort. He demanded the surrender of Gladwyn, saying a still greater force of Indians was on the march to swell the army of besiegers. Gladwyn was equally tenacious and unyielding; he proposed to "hold the fort" till the enemy were worn out or reënforcements arrived. Pontiac sought to arouse the active aid of the neighboring Canadians, but the Treaty of Paris had made them British subjects, and they dared not war on their conquerors. History scarcely furnishes a like instance of so large an Indian force struggling so long in an attack on a fortified place.

The Wyandots and Pottawottomis, however, never as enthusiastic in this war as the other tribes, late in July decided to withdraw from the besieging confederacy and make peace with the British. They did so, and exchanged prisoners with Gladwyn. The Ottawas and Ojibwas, however, still held on, watching the Fort and keeping up a desultory fusillade. The end was drawing nigh. On July 29th, Captain James Dalzell arrived from Niagara with artillery supplies and two hundred eighty men in twenty-two barges. Their approach to the Fort was bravely contested by the combined Indian forces, even the Wyandots and Pottawottomis breaking their treaty and treacherously joining in the assault. Dalzell's troops entered the Fort, and he proposed an immediate sortie. Dalzell was bravery personified, and he had fought with Israel Putnam.