The Shadow Defence Secretary has described a fall in the number of British military personnel as "shocking".
The Quarterly Personnel Service Statistics show there was a net outflow 3,610 personnel leaving in 2018.
That left 134,990 full-time trained servicemen and women at the start of January this year out of a required strength of 144,640.
It means the size of the trained British military is 6.7% below its own targets.
Shadow Defence Secretary Nia Griffith said:
"These figures show yet another shocking fall in the size of our Armed Forces.
"Despite warm words from Conservative Ministers, it is clear that they have no plan whatsoever to stem this appalling decline.
"At a time when our country faces growing security challenges, it is simply unacceptable for the Government to be running down our Armed Forces in this way."
A MOD spokesperson said: "We are fully committed to improving our recruitment process and we are working with Capita to ensure any challenges are being addressed.
"The Army continues to meet all of its operational commitments to keep Britain safe."