Holding attack
The British were surprised by the ambush and retreated in confusion, leaving seventeen dead on the field. Forsyth was the only American casualty. Even though Forsyth was killed, his feigned retreat and ambush succeeded at inflicting heavy casualties on the British force.

Battle of Lundy's Lane: In the July 1814 Battle of Lundy's Lane, American forces used deception at several critical points. When troops under Winfield Scott returned from attacks on British formations they were twice mistaken in the dark for a British unit and allowed to pass. In one incident, a British leader asked who was approaching by shouting "The 89th?" The Americans recognized the opportunity to pass unmolested and called back "The 89th!"
In another event, American Captain Ambrose Spencer saw a unit approaching in the dark. He rode up and called out "What regiment is that?" "The Royal Scots, Sir!" a Scottish officer replied. Spencer called out "Halt, Royal Scots!" and then rode off. Believing a superior officer had given them a command, the regiment stopped, then remained in place until a real British officer found them and gave them new orders.
In a third incident, British soldier Shadrach Byfield reported that an individual in a company of hidden Americans impersonated a British officer and told the British troops opposing them to form up and stand tall in preparation for inspection. The British troops believed a superior officer was addressing them and stood, enabling the Americans to fire a volley, after which they escaped retaliation by scattering in the dark.

Battle of Conjocta Creek: In August 1814, American Major Lodowick Morgan of the Regiment of Riflemen, who was based in Buffalo, New York, correctly deduced that the British were going to attack Buffalo from Canada by crossing the bridge at Conjocta Creek (also called Scajaquada). Morgan and 240 riflemen marched to the point where the road from Black Rock crossed the Conjocta. They sabotaged the bridge by pulling up a number of planks, then built breastworks at the south side. Afterwards, they continued on to Black Rock. Once at Black Rock, Morgan's troops marched back the way they came while playing music and making as much noise as possible to gain the attention of the British and make them believe the Americans were headed to Buffalo.
Once out of sight, Morgan and his men marched secretly through the woods to occupy the breastworks they had constructed on the south bank of the creek. The unsuspecting British arrived at the bridge and discovered the sabotage. While they halted to consider their options, Morgan began the Battle of Conjocta Creek by blowing a whistle to signal his soldiers, who fired a devastating volley. The British sought cover on the north bank and fired back, but the American troops remained protected behind their breastworks. The British attempted an assault on the breastworks, which the Americans repulsed. The British then attempted a flanking maneuver, which the Americans also repulsed. Unable to proceed past the Conjocta, the British retreated back to Canada. The Americans lost two killed and eight wounded, while the British sustained twelve killed and twenty-one wounded.

American Civil War: 

Peninsula campaign: In the American Civil War's Peninsula campaign, Union commander George B. McClellan was the victim of a deception executed by the forces under Confederate commander John B. Magruder during the 1862 Siege of Yorktown. Magruder, who had acted in and produced plays, used his knowledge of visual and audio effects to deceive McClellan into believing Magruder's force was larger than it was. These included placing straw dummy crewmen alongside Quaker guns—logs painted black to resemble cannons—in his defensive works. Magruder interspersed his Quaker guns with the few real cannons he possessed, making his artillery seem more numerous than it was. In addition, he used shouted orders and bugle calls to march his relatively small force of about 10,000 in front of Union positions until they were out of sight, then had them loop around unseen and march through the same area again, making his troop strength seem greater than it was. Magruder's elaborate charade convinced McClellan, who outnumbered Magruder by ten to one, that he faced a more formidable opponent than was actually the case, which caused him to delay attacking. McClellan's delay allowed Confederate reinforcements to arrive, causing him to retreat back to Washington, D.C.

Vicksburg campaign: In early 1863, Union naval commander David Dixon Porter lost a new ironclad, USS Indianola after it ran aground on the Mississippi River near Vicksburg, Mississippi and was captured by Confederate forces. As the Confederates attempted to repair and refloat the damaged ship so they could use it against Porter's fleet, Porter executed a deception to thwart their effort. His men constructed a giant dummy ironclad from barges, barrels, and other materials that were on hand. Made to resemble a new, real ironclad, USS Lafayette (1848), the dummy was painted black to give it a sinister appearance and flew the Jolly Roger pirate flag. Porter's sailors floated the dummy, christened Black Terror, downstream at night, and it appeared impervious to Confederate shore battery fire. Exaggerated rumors about the seemingly indestructible super ship quickly spread to Vicksburg and reached salvage crews working on Indianola. In a panic, they halted their efforts, blew up Indianola, and abandoned the wreckage. When Black Terror ran aground and was inspected by Confederates, local newspapers roundly criticized military and naval commanders for being unable to tell the difference between a real warship and a fake.

Second Boer War: During the Second Boer War, British commander Robert Baden-Powell made extensive use of deception during his October 1899 to May 1900 defense of Mafeking. After he occupied the town with a force of 1,500, Baden-Powell faced 8,000 Boers who intended to begin a siege. As the Boers advanced, Baden-Powell wrote a letter to a friend in Transvaal whom he knew had died, which contained news of the imminent approach of more British troops. Baden-Powell intended for the letter to be intercepted and when it fell into Boer hands, they believed it was real. As a result, they diverted 1,200 troops to guard the approaches against Baden-Powell's fictional reinforcements. Baden-Powell's troops also set up fake defensive works at a distance from the town itself, including one marked as his command post, which further diverted Boer attention. In addition, he had local residents execute deceptive tactics, including carrying boxes of sand labeled "mines" in places where they could be observed. Word of these supposed mines reached the Boers, and when they soon afterwards observed supposed minefields appear around the edge of the town, they assumed the danger was real. These deceptive measures held off a Boer attack, which allowed Baden-Powell time to improve Mafeking's defences. As a result of his effort, the British were able to hold out until reinforcements arrived and lifted the siege.

World War I: 

Gallipoli campaign: During World War I, deception shifted from the tactical level to the strategic as modernized warfare and advances in technology increased the size and complexity of battlefield organizations. Several methods of deception were used by the Australian and New Zealand Army Corps (Anzac) during its withdrawal from Gallipoli in Turkey, which was completed on 20 December 1915. As early as mid-November, artillery and sniper activity went silent for periods of time, giving the impression that the Anzacs were preparing to remain in the defense with limited resupply of ammunition during the upcoming winter. To cover the removal of the last troops, "drip rifles" were prepared to fire about 20 minutes after they were set, with a water can leaking into a second can that was tied to a rifle trigger. When the second can was full, the weight caused the unmanned rifle to fire. The sporadic firing created by this ruse convinced the Turks that the Anzac troops were still manning their defenses. In addition, Anzac troops used dummy artillery and mannequins to further enhance the impression that soldiers remained in their positions. As a result of these deceptive measures, both the main body of Anzac troops and the rear guard retreated unmolested. Given the failure of the Gallipoli effort from the Anzac perspective, the evacuation was considered the most successful part of the entire campaign.

Western front: In March 1917, leaders of the German Army on the Western Front decided to withdraw from their positions in France to the Hindenburg Line, a 90-mile long defensive position that ran from Arras to Laffaux. With Germany unable to conduct an offensive because of personnel losses earlier in the war, commanders intended for unrestricted submarine warfare and strategic bombing to weaken the British and French, giving the German army time to recuperate. In addition, the move to the Hindenburg Line supported the plan of commanders Paul von Hindenburg and Erich Ludendorff to shift the German focus to Russia and the Eastern Front. The withdrawal to the new defensive line would shorten Germany's front by 25 miles, enabling 13 divisions to be employed against the Russians.
Under the plan code named Operation Alberich, the Germans abandoned their old positions in a staged series that began in late February.