As a Lieutenant, you will need to master following:

• instruct in military duties
• manage administrative systems

More generally, a lieutenant is also versed in:

• advise superiors on military operations
• ensure compliance with policies
• lead military troops
• maintain operational communications
• military code
• military combat techniques
• military drill
• military weaponry
• surveillance methods
• train military troops
• write situation reports

It also helps to know the following:

• camouflage
• geographic information systems
• manage troop deployment
• devise military tactics
• ensure compliance with types of weapons
• ensure information security
• give battle commands
• identify security threats
• monitor equipment condition
• operate radio equipment
• patrol areas
• perform military operations
• undertake inspections