By Niall Paterson, Sky News Correspondent
David Cameron is pledging to create two million extra jobs over the course of the next parliament if the Conservatives are returned to power on 7 May.
The Tories believe they can match the job creation of the past five years, during which the Coalition created an average of 1,000 new jobs every day.
As the second day of campaigning gets under way, the Prime Minister said: "When we came into government in 2010, unemployment had rocketed.
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"Five years on, by working through our long-term plan, look at what we have achieved together.
"(There are) 1.9 million more jobs, more people in work in our country than ever before, more jobs created here than the rest of Europe combined, (and) more people with the security of a regular pay-packet, providing for themselves and their families.
"All this is at risk in just over a month's time. The choice is simple: we go back to square one, and the days of big unemployment.
"Or vote Conservative and finish what we have begun: with two million more jobs in the next five years.
"We are the jobs party - and over the next month, we will be fighting for every man and woman who wants to work and earn a wage."
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The pledge comes exactly a year after Chancellor George Osborne set a goal of full employment for Britain.
Mr Cameron argues an additional two million jobs is a feasible target thanks to government assistance for business, competitive tax rates, a parliament-long campaign against red tape, plus investment in infrastructure.
The Prime Minister's first outing of the election campaign proper was to address a rally of supporters at a school in Chippenham - a marginal constituency they need to take if they are to stand any chance of winning a majority.
Speaking at the event, Mr Cameron admitted he is not the "perfect" Prime Minister - but insisted he has a record to be "proud" of.
"I don't claim that I have got every call right or that I am the perfect Prime Minister," he said.
"But I know this. I had a job to do in 2010 and it was about sorting out our economy, getting the deficit down and getting people back to work."
On the first day of Labour's campaign, Ed Miliband tried to win over business with the launch of the party's first "mini manifesto".
The Labour leader warned of a "clear and present danger" to Britain if the country left the European Union.
Meanwhile, Nick Clegg and the Liberal Democrats will today seek to distinguish themselves from the Conservatives, and other parties, by focusing on mental health with a pledge of extra funding.
The party will promise an additional £3.5bn over the next parliament, with the aim of "revolutionising" adult and child mental health care.
In announcing the pledge, Mr Clegg is expected to say: "Equality for people with mental health issues is a liberal mission.
"In government again, we will continue to put mental health front and centre of the political debate.
"That's why I am so immensely proud that we are the first party to put equality for people with mental health problems on the front page of our full General Election manifesto.
"Only the Liberal Democrats can keep Britain on track and provide both a stronger economy and a fairer society with strong public services."
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