The phrase "and started a major" is not complete and lacks context, but it is grammatically correct and usable in written English.
You can use it when describing an action that involves initiating a significant project, event, or change, typically in a narrative or explanatory context.
Example: "After years of planning, the organization finally secured funding and started a major initiative to improve community health."
Alternatives: "and launched a significant" or "and initiated a major".
In July 2007 he became the 10th Music Director of the New Haven Symphony Orchestra (NHSO), with whom he instituted a 'Composer in Residence' Scheme (Augusta Read Thomas, Christopher Theofanidis, Hannah Lash) and started a major Walton Project with concerts, lectures/talks and recordings on the Nimbus Label.
The second 28 cm hit struck near the aircraft hangar and started a major fire.
Scharnhorst engaged Good Hope and hit her on the third salvo, striking between her forward gun turret and her conning tower and starting a major fire.
The crusaders arrived at Constantinople in the summer of 1203 and quickly attacked, started a major fire that damaged large parts of the city, and briefly seized control.
Last year, some prominent scholars and policy advisers started a major effort to push central officials to fundamentally change or repeal a law that generally punishes families for having more than one child.
With unemployment already rising as it prunes inefficient state industries, China was determined to prop up faltering economic growth, and in the second half of the year it started a major stimulus program of extra government spending and bank lending.
It seems to have worked: after its ouster, wrestling immediately started a major turnaround and charm offensive, overhauling its rules.
Researchers at the University of California, San Francisco, and eight other institutions have just started a major study of a vaccine that seeks to block the pleasurable sensations of satisfying a nicotine addiction.
A big push by the local council and some big-ticket projects have started a major revival, centred on the North Bay area, where a 1930s open-air theatre has been turned into a 7,000-seat 7,000-seatamestadiumicked off the summer season; Noel Gallagher and Busted are due).
The goals were never really designed just to help a few deserving poor people get mortgages, and nobody can deny that Bill Clinton started a major push to get more American's into housing debt.
But in the process, it will have started a major war, and "now you have the long slog," Baker said.
