Net Calories vs. Deficit

Sorry everyone, I believe I have read too much that it is confusing me! If I am eating 2700 Calories/ day, and doing a lot of Cardio (on a cardio day) to "burn" 1500-2000 cal/day in just exercise (I am in the Army and do PT twice a day) and my net is at the 500-1500 Calories a day am I going to go in "starvation" mode. It has been a challenge to eat that much while limiting Carbs. I am currently 219, trying to get under the "Army" standard for my height which is 203 to avoid getting taped after my PT Test. I have lost 8 Lbs over the past 2 weeks and intend on trying to do this the healthy way after the first month (2lbs/week). I don't feel hungary, I drink a ton of water and eat plenty of Greens and lean meats, I got the 4 week diet plan from Mens health (50-80 g carbs a day now : 150-225 g Protien)., then will transition to adding "good" carbs into my diet. With my math, I am in a 1500-2000 calorie deficiet/ day (3-4 lbs per week), but want to ensure that my body does not go into that ddreaded and dangerous "starvation". Thank you in advance for your replies!