The marine corps, in common interest with the army, has the responsibility to develop for landing forces, tactics, techniques and equipment

The Marine Corps, in common interest with the Army, has the responsibility to develop of doctrine for landing forces, tactics, techniques and equipment

Doctrine

Explanation:

The United States Marine Corps (USMC), is the part of the United States Armed Forces accountable for conducting expeditionary and amphibious operations with the United States Navy, the Army and the Air Force.

The Marine Corps have the responsibility of developing the doctrine used by landing forces, as well as tactics, techniques and equipment required.  

For example, during the 1930s, the Small Wars Manual and the Tentative Landing Operations Manual were published to establish the USMC doctrine.

answer; biological;

answer; quantitative versus qualitative research;