Unlikely. The U.S. Army would have had major advantages in numbers, logistics, and mobility. Ottawa and Toronto might each have proven too big to swallow and digest quickly, but severing their connection to the Atlantic would have made the question of their eventual surrender only a matter of time.
 This could have been due to a fear of crossing in New York, where there were many more Federalists opposed to the war that would not come to aid the troops if they needed help. There was very poor planning in the invasions of Canada and it showed in execution. America won no Canadian battles let alone territory.
Our two countries share a deep and longstanding defence and national security partnership, providing both countries with greater security than could be achieved individually. Trade and investment between Canada and the U.S. supports millions of jobs.
The Canadian Armed Forces is comprised of approximately 68,000 Regular Force and 27,000 Reserve Force members, increasing to 71,500 and 30,000 respectively under Strong, Secure, Engaged − Canada's defence policy, as well as 5,200 Ranger Patrol Group members.
NATO Ambassadors signed the Accession Protocols for Finland and Sweden on July 5, 2022, and on the same day, Canada became the first country to ratify them. Once all Allies have ratified the Accession Protocols, Finland and Sweden will be invited to accede to the Washington Treaty and officially join NATO.
The second largest country on earth, Canada's borders consist of three oceans and the United States, which is not only an ally, but also one of the most powerful nations in the world. As such, invading the country would prove to be an extremely difficult task.
The United States invaded Canada in two wars: Invasion of Canada (1775), American Revolutionary War. Invasion of Canada (1812), War of 1812.
While it has no more permanently stationed nuclear weapons as of 1984, Canada continues to cooperate with the United States and its nuclear weapons program.
Canada does not have nuclear, chemical, or biological weapons or relevant delivery systems, and is a member in good standing of all relevant nonproliferation treaties and regimes.
Yes, America Almost Invaded Canada in 1921 (And Started a World War) | The National Interest.
The American Civil War is the conflict with the largest number of American military fatalities in history. In fact, the Civil War's death toll is comparable to all other major wars combined, the deadliest of which were the World Wars, which have a combined death toll of more than 520,000 American fatalities.
US lost five major wars after 1945
However, the US was unable to get any significant victory in its wars abroad. America fought five major wars after 1945 including Korea, Vietnam, Gulf War, Iraq, and Afghanistan in addition to some minor wars in Somalia, Yemen, and Libya.
The country has been physically invaded a few times – once during the War of 1812, once during the Mexican–American War, several times during the Mexican Border War, and three times during World War II, two of which were air attacks on American soil.
United States. The United States of America is a North American nation that is the world's most dominant economic and military power. Likewise, its cultural imprint spans the world, led in large part by its popular culture expressed in music, movies and television.
In 1969 then Prime Minister Pierre Trudeau withdrew half of Canada's forces in Europe, even as many leftist intellectuals and peace activists called for a complete withdrawal from NATO.
Canada still maintains strong ties with the UK as part of the commonwealth. Canada's largest trading partner and ally is the United States. Today, its government is a parliamentary democracy.
NATO's Command Structure is under the authority of the Military Committee, NATO's highest military authority composed of the Chiefs of Defence of all twenty-nine member countries.
But both Hitler and Stalin were outdone by Mao Zedong. From 1958 to 1962, his Great Leap Forward policy led to the deaths of up to 45 million people—easily making it the biggest episode of mass murder ever recorded.
World War II
The war pitted the Allies and the Axis power in the deadliest war in history, and was responsible for the deaths of over 70 million people. Known for its genocidal campaign against the Jewish people, the war was also responsible for the deaths of more than 50 million civilians.