A military alliance is an agreement between two or more countries regarding mutual support in case of war.
A business alliance might be motivated by cost reduction and improved service for the customer, for example through code sharing, for instance airline alliances; many if not all large airlines participate in one or more business alliances.
There is a left-wing political party in New Zealand that is known simply as "the Alliance". Other parties, such as the Canadian Alliance, can also be referred to as "the Alliance".
Alliance is also the name of a number of places in the United States of America.
and in Canada
Biblical usage
Abraham formed an alliance with some of the Canaanitish
princes (Gen. 14:13), also with Abimelech (21:22-32). Joshua and
the elders of Israel entered into an alliance with the
Gibeonites (Josh. 9:3-27). When the Israelites entered Canaan
they were forbidden to enter into alliances with the inhabitants
of the country (Lev. 18:3, 4; 20:22, 23).
Solomon formed a league with Hiram (1 Kings 5:12). This "brotherly covenant" is referred to 250 years afterwards (Amos 1:9). He also appears to have entered into an alliance with Pharaoh (1 Kings 10:28, 29).
In the subsequent history of the kingdoms of Judah and Israel various alliances were formed between them and also with neighbouring nations at different times.
From patriarchal times a covenant of alliance was sealed by the blood of some sacrificial victim. The animal sacrificed was cut in two (except birds), and between these two parts the persons contracting the alliance passed (Gen. 15:10). There are frequent allusions to this practice (Jer. 34:18). Such alliances were called "covenants of salt" (Num. 18:19; 2 Chr. 13:5), salt being the symbol of perpetuity. A pillar was set up as a memorial of the alliance between Laban and Jacob (Gen. 31:52). The Jews throughout their whole history attached great importance to fidelity to their engagements. Divine wrath fell upon the violators of them (Josh. 9:18; 2 Sam. 21:1, 2; Ezek. 17:16).
Source: Easton's Bible Dictionary (1897)\n