Although there had been exceptions like the outlandish Ford V8 specials created by the Romanians for the 1936 Monte Carlo Rally, rallies before World War II had tended to be for standard or near-standard production cars, a rule supported by manufacturers because it created a relatively even playing field. After the war, most competing cars were production saloons or sports cars, with only minor modifications to improve performance, handling, braking and suspension. This kept costs down and allowed many more people to afford the sport using ordinary family cars, so entry lists grew into the hundreds.
"bring together," c.1600, from French rallier, from Old French ralier "reassemble, unite again," from re- "again" (see re-) + alier "unite" (see ally (v.)). Intransitive meaning "pull together hastily, recover order, revive, rouse" is from 1660s. Related: Rallied; rallying. Rally round the flag (1862) is a line from popular American Civil War song "Battle Cry of Freedom."
The quest for longer and tougher events saw the re-establishment of the intercontinental rallies beginning with the London–Sydney Marathon held in 1968. The rally trekked across Europe, the Middle-East and the sub-continent before boarding a ship in Bombay to arrive in Fremantle eight days later before the final push across Australia to Sydney. The huge success of this event saw the creation of the World Cup Rallies, linked to Association Football's FIFA World Cup. The first was the 1970 London to Mexico World Cup Rally which saw competitors travel from London eastwards across to Bulgaria before turning westwards on a more southerly route before boarding a ship in Lisbon. Disembarking in Rio de Janeiro the route travelled southward into Argentina before turning northwards along the western coast of South America before arriving in Mexico City.
Rising investor confidence also indicates a rally, and it is perhaps more powerful than any economic indicator because when investors believe something is going to happen (a rally, for example), they tend to take action (purchasing shares in order to profit from expected price increases) that actually turn expectations into reality. Although it is an objective concept, investor sentiment shows through in mathematical measurements such as the put/call ratio, the advance/decline line, IPO activity, and the amount of outstanding margin debt.