SourceAt present, overseas service for the part-time soldiers is voluntary, with only half of the TA's 25,000 troops making themselves available for active service.
Instead of being asked to volunteer for Iraq and Afghanistan, part-time soldiers will in future be warned that they may be asked to resign if they fail to respond to a call up.
A review has now been launched which is expected to slim the service down to around 15,000 men and women, who will all be required to go on a tour of duty at least once every six years.
Ordered by General Sir Richard Dannatt, the Chief of the Defence Staff, the review is designed to ensure a slimmed down, more professional TA in future.
In a BBC interview, Sir Jock Stirrup, Chief of the Defence Staff, denied that some members of the force, which is in its centenary year, were more interested in showing off in military uniforms than fighting for their country - but insisted everyone in the TA should be prepared to serve.
He said: "I don't think we've got very many of [that] kind of people ... any more, if any. They are an integral part of our force structure.
"If you join the TA you're joining the military and you take on the responsibilities that the military assumes."
Troop levels in the Territorial Army fell rapidly in the years immediately following the invasion of Iraq, when nearly 7,000 TA soldiers were called up to join in Operation Telic, with many "weekend warriors" deciding that they did not want to put their lives on the line.
Around 6,000 left between 2004 and 2005 alone, and the TA is now at its lowest level since it was founded in 1907.
Before the invasion, recruitment had been running at around 150 a month, but this dried up after the war, as civilians were unwilling to sign up to participate in an increasingly unpopular conflict which involved the real possibility of loss of life.
The situation has been compounded in recent months as the conflict in Afghanistan has entered a particularly bloody phase. Last month three members of the TA were killed when their armoured Land Rover was hit by a roadside bomb.
The incident was the biggest loss of life for the TA since the second world war. Seven members of the TA have been killed in Afghanistan and five in Iraq since 2003.
There are now 850 reservists serving overseas, including 700 members of the TA, more than at any time since the Korean War.
I remember when we got the brown envelope for Telic 1 and heard that 10-15 of our Regiment had resigned as soon as it was clearly going to happen. I'll be interested to see if the 'Rank structure preservation' allows the old sweats and the fat knackers/biff chitters a free pass again though, as there were a shed load of those skiivers who managed to pull a dodge last time.
TBH I thought it was a bit surprising that 'intelligent mobilisaton (a misnomer if ever I heard one) allows so many noobs and people withou a tour behind them to opt out. I can't see there being that many left to switch the light off this time around though. Question is - does it prove that National Service is now a necessity for us? Iraq is (allegedly) winding down, but Afghanistan will roll on for donkey's years. Another thing - how can the powers that be guarantee our jobs if it becomes more likely that we HAVE to go in support of continuing OP's every few years rather than 'once in a blue moon'?
That said, I would go again if compulsory - called. I am just not in a rush to volunteer.