Mauritania
green with a yellow five-pointed star above a yellow,
horizontal crescent; the closed side of the crescent is down; the
crescent, star, and color green are traditional symbols of Islam

Mauritius
four equal horizontal bands of red (top), blue, yellow,
and green

Mayotte
the flag of France is used

Mexico
three equal vertical bands of green (hoist side), white, and
red; the coat of arms (an eagle perched on a cactus with a snake in
its beak) is centered in the white band

Micronesia, Federated States of
light blue with four white
five-pointed stars centered; the stars are arranged in a diamond
pattern

Midway Islands
the flag of the US is used

Moldova
same color scheme as Romania - three equal vertical bands of
blue (hoist side), yellow, and red; emblem in center of flag is of a
Roman eagle of gold outlined in black with a red beak and talons
carrying a yellow cross in its beak and a green olive branch in its
right talons and a yellow scepter in its left talons; on its breast
is a shield divided horizontally red over blue with a stylized ox
head, star, rose, and crescent all in black-outlined yellow

Monaco
two equal horizontal bands of red (top) and white; similar to
the flag of Indonesia which is longer and the flag of Poland which
is white (top) and red

Mongolia
three equal, vertical bands of red (hoist side), blue, and
red; centered on the hoist-side red band in yellow is the national
emblem ("soyombo" - a columnar arrangement of abstract and geometric
representation for fire, sun, moon, earth, water, and the yin-yang
symbol)

Montserrat
blue, with the flag of the UK in the upper hoist-side
quadrant and the Montserratian coat of arms centered in the outer
half of the flag; the coat of arms features a woman standing beside
a yellow harp with her arm around a black cross