A slightly revised version of your letter:
To The Entry Clearance Officer,
I am writing to sponsor my husband's application for a settlement visa as the spouse of a UK citizen.
I am a UK citizen and lived in England from birth to (year you moved to the US). I then lived in the US from X year and returned to the UK on Y date.
We meet the financial requirement under Category E: Pension Income as my husband is retired US Air Force and receives and annual retirement pension of $25,656.60 from the US government. He has been receiving his pension since Z date and we are including evidence of this.
Once the visa has been granted, will temporarily live with my father at (his address), which he owns. It is a 2 bedroom house with 1 bathroom, a living room and dining room. There will be 3 adults and a 10 year old living there until we find a home of our own to rent. I am including his Land Registry document and a letter of permission from him.
My husband and I met in 1999 in Maryland (say how you met - why you were in the US) and married in 2003 in Virginia, where we lived together until (date). We have one daughter, born on (date) who is a UK citizen and therefore not included in the financial requirements. I returned to the UK on (date) so I could prepare for us to move back to the UK permanently as a family.
Since my return to the UK, we have kept in touch everyday by Facebook Messenger and call via FaceTime at least once a week. My husband just recently came for a short visit from X to Y dates. We are choosing to settle in the UK for a better life for our family and so our daughter can grow up closer to family.
Thank you in advance for your consideration of my husband's application.
Kind regards, etc.....
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