Reservists will get £40 million of new kit and extra overseas training opportunities in the latest steps to increase the size of the part-time forces.
Members of the Territorial Army - to be renamed the Army Reserve under the shake-up - will be able to use high-tech equipment including helmet-mounted night vision and upgraded SA80 rifles.
A white paper on Wednesday will set out financial incentives for small firms employing reservists.
It will set out how the number of trained reservists will increase from 19,000 to 30,000 by 2018 in preparation for them taking on more operations alongside their Regular counterparts.
More top news
The PM faces a countdown to settle a deal before her minority government tries to get its Queen's Speech plans approved by the Commons.
More details will come today on proposals to offer EU residents the right to a new "settled status" in Britain after it leaves the bloc.
Scotland and Northern Ireland could see rain later but for the rest of the UK it should be a fine day.