Answer 1. To insure civilian control of the military, Congress may not appropriate money for military spending for a period longer
than two years.
What article and clause is this located in the constitution

Article One, Section 8, Clause 12 of the Constitution of the United States.

Explanation:

Article One of the Constitution, in its Section 8, Clause 12, establishes limits to the financing of the Congress to the armed forces, establishing that the allocations to the budget in the matter cannot exceed two years of planning. This is due to the fact that, if it were financed for a longer time, the Army could acquire a sum of power that could jeopardize the normal development of democracy.