The U.S. Department of Defense says it allocated 613-billion dollars for its defense budget in fiscal year 2013, reducing the fund for the first time since 2001 when the 9/11 terrorist attacks took place.

The Pentagon will shrink the Army from 570-thousand to 490-thousand soldiers by 2017, and the number of Marines will be reduced from 202-thousand to 182-thousand.

The Pentagon also said it will postpone its purchase of next generation F-35 fighter jets and delay the adoption of submarines and amphibious tanks.

Meanwhile, it will expand special operations forces. The number of Navy SEALS will increase to 70-thousand, and the number of unmanned attack aircrafts will climb to 85.

The new defense budget bill will be submitted to Congress on February 13th.