Understanding amendments 2 and 3

Second Amendment

A well regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms, shall not be infringed.

Summary of the Second Amendment

To server as a member of the military or contending forces.
The 2nd Amendment Defined

Third Amendment

No Soldier shall, in time of peace be quartered in any house, without the consent of the Owner, nor in time of war, but in a manner to be prescribed by law.

Summary of the Third Amendment

No soldier shall sleep or stay in a house without the owner giving permission.
The Third Amendment