Federalist No. 29
Federalist No. 29, authored by Alexander Hamilton under the pen name Publius, is the twenty ninth of 85 essays. Titled "Concerning the Militia", Hamilton writes about the importance of the armed forces, from times of insurrection and invasion to "the duties of superintending the common defense, and of watching over the internal peace of the Confederacy."
Federalist 29 is unusual in that it was published out of order on January 9, 1788, appearing after the publication of Federalist No. 36.