As so many soldiers came home from the Civil War questioning the Church of England and then joining the new Quaker movements, it would be good to research the topic.
http://dla.library.upenn.edu/cocoon/dla/pacscl/ead.html?fq=subject_...;
"Cromwell and the Quakers: A Historical Dissertation" (MC.975.07.050), Quaker & Special Collections, Haverford College, Haverford, PA.
written by Paul M. James (ca. 1930-) attended the University College of Wales (now Aberystwyth University), where he graduated with a B.A. in 1952.
Another relevant movement of the early 17th century:
https://universalistfriends.org/library/militant-seedbeds-of-early-...
Militant Seedbeds Of Early Quakerism
by David Boulton
"David Boulton is a member of Kendal Monthly Meeting in Britain and the Quaker Universalist Group. A broadcaster and author, he has written widely on Quaker history and radical theology. An American edition of his latest book, The Trouble with God: Building the Republic of Heaven, will be published in October by John Hunt Publishing. He has lectured and led workshops in the United Kingdom, Australia, New Zealand and the United States. In May, 2005, he joined Kitty and David Rush in leading a weekend workshop at Pendle Hill on The Experience and Understanding of Nontheism in Contem-porary Quakerism.
— Rhoda R. Gilman"
"We need to remind ourselves that in this, their pioneering decade, Quakers, including George Fox, were not yet pacifists; that they supported Cromwell’s armed rule for much of the decade; that they served the republic as soldiers and naval officers; that they were widely perceived by their contemporaries, friends and enemies alike, as representing the radical or left wing of the armed revolution, in alliance with the army; and that this perception, far from being a calumny invented by the Quakers’ enemies, was a fair reading of their position."
later:
"American historian Richard Vann refers to 95 Quakers who served in the army, but there were hundreds more."
continuing:
There are 46 men Fox names (or whose names have been added as footnotes by his editors) in his Pendle-to-Swarthmoor narrative—the mythic origin of the Quaker movement. Thirteen of these are “priests” or JPs who may or may not have had direct military connections. Of the remaining 33, no fewer than 20—well over half—carry a military rank, or are known from other sources to have been in the army or connected with it. Of course, some of the remaining 13 may also have served in the army although there is no specific mention of it. However we compute it, army men are strongly and disproportionately represented in this account. What, then, might we infer from this?"
"Barry Reay finds evidence of Quaker recruitment in the army garrisons in York, BRISTOL, Holy Island and Berwick-upon-Tweed, Lancaster, Carlisle, Chester, Kent, Northamptonshire, Norfolk, Shrewsbury and London."
emphasis on Bristol my own... An Alberson family hailed from that general area..
Also:
Friends were particularly successful in making Quakers of the soldiers in Cromwell’s army of conquest in Ireland in 1655 and 1656, with one officer, Colonel Nicholas Kempson, promising to build a meetinghouse in Cavan, another provincial governor, Richard Hodden of Kinsale, appointing a Quaker minister to preach to his troops, and another, Governor Robert Phayre of Cork, reporting that “more is done by the Quakers than all the priests in the country have done in a hundred years”. (vis perhaps our William Alberson of Castledermot)!?