I read the 74th federalist paper and hoave know idea of what it means, can someone tell me please?

Answer 1

You might find that the simplified-language version on the following page makes it clearer:
http://en.allexperts.com/q/U-S-History-672/summary-analysis.htm

Answer 2

It further outlines the powers of the president, as seen by Alexander Hamilton, the author. It makes clear that the military shall be under the direct orders of the president (or executive, as he calls the position, the title president not having been agreed on yet). This includes command of the various state and local militias in the event of a national emergency. This had been a problem previously when militias had insisted they were only subject to commands from their state governments or others, and resisted central control, even when urgently necessary.

The bulk of the paper outlines the president's power to pardon those convicted of crimes, and explains why it's necessary and why he is the best person to wield this power.