It is easy to argue the democracy of the US has always used military action to extend and establish its power. However, that behavior comes from the old war and the American Revolution was fought to break from the old world. The following is a quote from Thomas Paine. His words helped unite the colonist against British imperialism.
Every war terminates with an addition of taxes, and consequently with an addition of revenue; and in any event of war, in the manner they are now commenced and concluded, the power and interest of Governments are increased. War, therefore, from its productiveness, as it easily furnishes the pretense of necessity for taxes and appointments to places and offices, becomes a principal part of the system of old Governments; and to establish any mode to abolish war, however advantageous it might be to Nations, would be to take from such Government the most lucrative of its branches. . . . It is time to dismiss that inattention which has so long been the encouraging cause of stretching taxation to excess. . . . To say that any people are not fit for freedom, is to make poverty their choice, and to say they had rather be loaded with taxes than not. . . . If, from the more wretched parts of the old world, we look at those which are in an advanced stage of improvement we still find the greedy hand of government thrusting itself into every corner and crevice of industry, and grasping the spoil of the multitude. Invention is continually exercised to furnish new pretenses for revenue and taxation. It watches prosperity as its prey, and permits none to escape without a tribute. . . . Can we possibly suppose that if governments had originated in a right principle, and had not an interest in pursuing a wrong one, the world could have been in the wretched and quarrelsome condition we have seen it? What inducement has the farmer, while following the plough, to lay aside his peaceful pursuit, and go to war with the farmer of another country? or what inducement has the manufacturer? What is dominion to them, or to any class of men in a nation? Does it add an acre to any man's estate, or raise its value? Are not conquest and defeat each of the same price, and taxes the never-failing consequence? . . . Government, on the old system, is an assumption of power, for the aggrandizement of itself; on the new, a delegation of power for the common benefit of society. The former supports itself by keeping up a system of war; the latter promotes a system of peace, as the true means of enriching a nation.