Not the Rebel alliance, but a dark textured pattern.
Source Hendrik Lammers
A criss-cross pattern similar to one I saw mown into a sports field.
Source Firkin
Tiny circle waves, almost like the ocean.
Source Sagive
Scanned some rice paper and tiled it up for you. Enjoy.
Source Atle Mo
Luxurious looking pattern (for a T-shirt maybe?) with a hint of green.
Source Simon Meek
This one is something special. I’d call it a flat pattern, too. Very well done, sir!
Source GetDiscount
A dark gray, sandy pattern with small light dots, and some angled strokes.
Source Atle Mo
The original enhanced with some gradients.
Source Firkin
A slightly grainy paper pattern with small horizontal and vertical strokes.
Source Atle Mo
Zero CC tileable seed texture, edited by me to be seamless from a Pixabay image. CC0
Source Sojan Janso
A repeating gloomy background image. This one consists of a pattern of black chains layered on top of a dark textured background.
Source V. Hartikainen
This one is amazing, truly original. Go use it!
Source Viahorizon
A seamless texture of black leather. I think it will look best when used in headers, footers or sidebars.
Source V. Hartikainen
From a drawing in 'Art Embroidery', M.S. Lockwood and E. Glaister, 1878.
Source Firkin
A repeating background of beige (or is it more vanilla yellow) textured stripes. One more background with stripes.
Source V. Hartikainen
A web texture of brown canvas. Will look great, when used in dark web designs.
Source V. Hartikainen
This was submitted in a beige color, hence the name. Now it’s a gray paper pattern.
Source Konstantin Ivanov
An alternative colour scheme for the original background.
Source Firkin
A seamless pattern that includes the original tile (go to Objects / Pattern / Pattern To Objects in Inkscape's menu to extract it).
Source GDJ
A dark one with geometric shapes and dotted lines.
Source Mohawk Studios
Abstract Tiled Background Extended 10
Source GDJ
From a drawing in 'Sun Pictures of the Norfolk Broads', Ernest Suffling, 1892.
Source Firkin
The rectangular tile this is based on can be had by selecting the rectangle in Inkscape and using shift+alt+i
Source Firkin